[docs] Bump cdc version to 2.4.0 in docs

This closes #2237.

Author: ruanhang1993

docs/content/about.md

@@ -84,7 +84,7 @@ Include following Maven dependency (available through Maven Central):
   <!-- add the dependency matching your database -->
   <artifactId>flink-connector-mysql-cdc</artifactId>
   <!-- The dependency is available only for stable releases, SNAPSHOT dependency need build by yourself. -->
-  <version>2.4-SNAPSHOT</version>
+  <version>2.4.0</version>
 </dependency>
 ```
 

docs/content/connectors/db2-cdc.md

@@ -23,15 +23,15 @@ using a build automation tool (such as Maven or SBT) and SQL Client with SQL JAR
   <groupId>com.ververica</groupId>
   <artifactId>flink-connector-db2-cdc</artifactId>
   <!-- The dependency is available only for stable releases, SNAPSHOT dependency need build by yourself. -->
-  <version>2.4-SNAPSHOT</version>
+  <version>2.4.0</version>
 </dependency>
 ```
 
 ### SQL Client JAR
 
 ```Download link is available only for stable releases.```
 
-Download [flink-sql-connector-db2-cdc-2.4-SNAPSHOT.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-db2-cdc/2.4-SNAPSHOT/flink-sql-connector-db2-cdc-2.4-SNAPSHOT.jar) and 
+Download [flink-sql-connector-db2-cdc-2.4.0.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-db2-cdc/2.4.0/flink-sql-connector-db2-cdc-2.4.0.jar) and 
 put it under `<FLINK_HOME>/lib/`.
 
 **Note:** flink-sql-connector-db2-cdc-XXX-SNAPSHOT version is the code corresponding to the development branch. Users 

docs/content/connectors/mongodb-cdc(ZH).md

@@ -13,15 +13,15 @@ MongoDB CDC 连接器允许从 MongoDB 读取快照数据和增量数据。 本
   <groupId>com.ververica</groupId>
   <artifactId>flink-connector-mongodb-cdc</artifactId>
   <!-- 依赖项仅适用于稳定版本，SNAPSHOT依赖项需要自己构建。 -->
-  <version>2.4-SNAPSHOT</version>
+  <version>2.4.0</version>
 </dependency>
 ```
 
 ### SQL Client JAR
 
 ```下载链接仅适用于稳定版本。```
 
-下载 [flink-sql-connector-mongodb-cdc-2.4-SNAPSHOT.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-mongodb-cdc/2.4-SNAPSHOT/flink-sql-connector-mongodb-cdc-2.4-SNAPSHOT.jar) 把它放在 `<FLINK_HOME>/lib/`.
+下载 [flink-sql-connector-mongodb-cdc-2.4.0.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-mongodb-cdc/2.4.0/flink-sql-connector-mongodb-cdc-2.4.0.jar) 把它放在 `<FLINK_HOME>/lib/`.
 
 **注意:** flink-sql-connector-mongodb-cdc-XXX-SNAPSHOT 版本是与开发分支相对应的代码。 用户需要下载源代码并编译相应的jar。 用户应使用已发布的版本，例如 [flink-sql-connector-mongodb-cdc-2.3.0.jar](https://mvnrepository.com/artifact/com.ververica/flink-sql-connector-mongodb-cdc), 发布的版本将在 Maven 中央仓库中提供。
 

docs/content/connectors/mongodb-cdc.md

@@ -13,15 +13,15 @@ In order to setup the MongoDB CDC connector, the following table provides depend
   <groupId>com.ververica</groupId>
   <artifactId>flink-connector-mongodb-cdc</artifactId>
   <!-- The dependency is available only for stable releases, SNAPSHOT dependency need build by yourself. -->
-  <version>2.4-SNAPSHOT</version>
+  <version>2.4.0</version>
 </dependency>
 ```
 
 ### SQL Client JAR
 
 ```Download link is available only for stable releases.```
 
-Download [flink-sql-connector-mongodb-cdc-2.4-SNAPSHOT.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-mongodb-cdc/2.4-SNAPSHOT/flink-sql-connector-mongodb-cdc-2.4-SNAPSHOT.jar) and put it under `<FLINK_HOME>/lib/`.
+Download [flink-sql-connector-mongodb-cdc-2.4.0.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-mongodb-cdc/2.4.0/flink-sql-connector-mongodb-cdc-2.4.0.jar) and put it under `<FLINK_HOME>/lib/`.
 
 **Note:** flink-sql-connector-mongodb-cdc-XXX-SNAPSHOT version is the code corresponding to the development branch. Users need to download the source code and compile the corresponding jar. Users should use the released version, such as [flink-sql-connector-mongodb-cdc-2.2.1.jar](https://mvnrepository.com/artifact/com.ververica/flink-sql-connector-mongodb-cdc), the released version will be available in the Maven central warehouse.
 

docs/content/connectors/mysql-cdc(ZH).md

@@ -20,15 +20,15 @@ MySQL CDC 连接器允许从 MySQL 数据库读取快照数据和增量数据。
   <groupId>com.ververica</groupId>
   <artifactId>flink-connector-mysql-cdc</artifactId>
   <!-- 请使用已发布的版本依赖，snapshot版本的依赖需要本地自行编译。 -->
-  <version>2.4-SNAPSHOT</version>
+  <version>2.4.0</version>
 </dependency>
 ```
 
 ### SQL Client JAR
 
 ```下载链接仅在已发布版本可用，请在文档网站左下角选择浏览已发布的版本。```
 
-下载 [flink-sql-connector-mysql-cdc-2.4-SNAPSHOT.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-mysql-cdc/2.4-SNAPSHOT/flink-sql-connector-mysql-cdc-2.4-SNAPSHOT.jar) 到 `<FLINK_HOME>/lib/` 目录下。
+下载 [flink-sql-connector-mysql-cdc-2.4.0.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-mysql-cdc/2.4.0/flink-sql-connector-mysql-cdc-2.4.0.jar) 到 `<FLINK_HOME>/lib/` 目录下。
 
 **注意:** flink-sql-connector-mysql-cdc-XXX-SNAPSHOT 版本是开发分支`release-XXX`对应的快照版本，快照版本用户需要下载源代码并编译相应的 jar。用户应使用已经发布的版本，例如 [flink-sql-connector-mysql-cdc-2.2.1.jar](https://mvnrepository.com/artifact/com.ververica/flink-sql-connector-mysql-cdc) 当前已发布的所有版本都可以在 Maven 中央仓库获取。
 

docs/content/connectors/mysql-cdc.md

@@ -21,15 +21,15 @@ In order to setup the MySQL CDC connector, the following table provides dependen
   <groupId>com.ververica</groupId>
   <artifactId>flink-connector-mysql-cdc</artifactId>
   <!-- The dependency is available only for stable releases, SNAPSHOT dependency need build by yourself. -->
-  <version>2.4-SNAPSHOT</version>
+  <version>2.4.0</version>
 </dependency>
 ```
 
 ### SQL Client JAR
 
 ```Download link is available only for stable releases.```
 
-Download [flink-sql-connector-mysql-cdc-2.4-SNAPSHOT.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-mysql-cdc/2.4-SNAPSHOT/flink-sql-connector-mysql-cdc-2.4-SNAPSHOT.jar) and put it under `<FLINK_HOME>/lib/`.
+Download [flink-sql-connector-mysql-cdc-2.4.0.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-mysql-cdc/2.4.0/flink-sql-connector-mysql-cdc-2.4.0.jar) and put it under `<FLINK_HOME>/lib/`.
 
 **Note:** flink-sql-connector-mysql-cdc-XXX-SNAPSHOT version is the code corresponding to the development branch. Users need to download the source code and compile the corresponding jar. Users should use the released version, such as [flink-sql-connector-mysql-cdc-2.3.0.jar](https://mvnrepository.com/artifact/com.ververica/flink-connector-mysql-cdc), the released version will be available in the Maven central warehouse. 
 

docs/content/connectors/oceanbase-cdc(ZH).md

@@ -11,7 +11,7 @@ OceanBase CDC 连接器允许从 OceanBase 读取快照数据和增量数据。
   <groupId>com.ververica</groupId>
   <artifactId>flink-connector-oceanbase-cdc</artifactId>
   <!--  请使用已发布的版本依赖，snapshot 版本的依赖需要本地自行编译。 -->
-  <version>2.4-SNAPSHOT</version>
+  <version>2.4.0</version>
 </dependency>
 ```
 
@@ -29,7 +29,7 @@ OceanBase CDC 连接器允许从 OceanBase 读取快照数据和增量数据。
 
 ```下载链接仅在已发布版本可用，请在文档网站左下角选择浏览已发布的版本。```
 
-下载[flink-sql-connector-oceanbase-cdc-2.4-SNAPSHOT.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-oceanbase-cdc/2.4-SNAPSHOT/flink-sql-connector-oceanbase-cdc-2.4-SNAPSHOT.jar)  到 `<FLINK_HOME>/lib/` 目录下。
+下载[flink-sql-connector-oceanbase-cdc-2.4.0.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-oceanbase-cdc/2.4.0/flink-sql-connector-oceanbase-cdc-2.4.0.jar)  到 `<FLINK_HOME>/lib/` 目录下。
 
 **注意:** flink-sql-connector-oceanbase-cdc-XXX-SNAPSHOT 版本是开发分支`release-XXX`对应的快照版本，快照版本用户需要下载源代码并编译相应的 jar。用户应使用已经发布的版本，例如 [flink-sql-connector-oceanbase-cdc-2.3.0.jar](https://mvnrepository.com/artifact/com.ververica/flink-sql-connector-oceanbase-cdc) 当前已发布的所有版本都可以在 Maven 中央仓库获取。
 

docs/content/connectors/oceanbase-cdc.md

@@ -12,7 +12,7 @@ In order to set up the OceanBase CDC connector, the following table provides dep
   <groupId>com.ververica</groupId>
   <artifactId>flink-connector-oceanbase-cdc</artifactId>
   <!-- The dependency is available only for stable releases, SNAPSHOT dependency need build by yourself. -->
-  <version>2.4-SNAPSHOT</version>
+  <version>2.4.0</version>
 </dependency>
 ```
 
@@ -30,7 +30,7 @@ If you want to use OceanBase JDBC driver to connect to the enterprise edition da
 
 ```Download link is available only for stable releases.```
 
-Download [flink-sql-connector-oceanbase-cdc-2.4-SNAPSHOT.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-oceanbase-cdc/2.4-SNAPSHOT/flink-sql-connector-oceanbase-cdc-2.4-SNAPSHOT.jar) and put it under `<FLINK_HOME>/lib/`.
+Download [flink-sql-connector-oceanbase-cdc-2.4.0.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-oceanbase-cdc/2.4.0/flink-sql-connector-oceanbase-cdc-2.4.0.jar) and put it under `<FLINK_HOME>/lib/`.
 
 **Note:** flink-sql-connector-oceanbase-cdc-XXX-SNAPSHOT version is the code corresponding to the development branch. Users need to download the source code and compile the corresponding jar. Users should use the released version, such as [flink-sql-connector-oceanbase-cdc-2.2.1.jar](https://mvnrepository.com/artifact/com.ververica/flink-sql-connector-oceanbase-cdc), the released version will be available in the Maven central warehouse.
 

docs/content/connectors/oracle-cdc.md

@@ -14,15 +14,15 @@ In order to setup the Oracle CDC connector, the following table provides depende
   <groupId>com.ververica</groupId>
   <artifactId>flink-connector-oracle-cdc</artifactId>
   <!-- The dependency is available only for stable releases, SNAPSHOT dependency need build by yourself. -->
-  <version>2.4-SNAPSHOT</version>
+  <version>2.4.0</version>
 </dependency>
 ```
 
 ### SQL Client JAR
 
 **Download link is available only for stable releases.**
 
-Download [flink-sql-connector-oracle-cdc-2.4-SNAPSHOT.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-oracle-cdc/2.4-SNAPSHOT/flink-sql-connector-oracle-cdc-2.4-SNAPSHOT.jar) and put it under `<FLINK_HOME>/lib/`.
+Download [flink-sql-connector-oracle-cdc-2.4.0.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-oracle-cdc/2.4.0/flink-sql-connector-oracle-cdc-2.4.0.jar) and put it under `<FLINK_HOME>/lib/`.
 
 **Note:** flink-sql-connector-oracle-cdc-XXX-SNAPSHOT version is the code corresponding to the development branch. Users need to download the source code and compile the corresponding jar. Users should use the released version, such as [flink-sql-connector-oracle-cdc-2.3.0.jar](https://mvnrepository.com/artifact/com.ververica/flink-sql-connector-oracle-cdc), the released version will be available in the Maven central warehouse.
 

docs/content/connectors/postgres-cdc.md

@@ -14,15 +14,15 @@ In order to setup the Postgres CDC connector, the following table provides depen
   <groupId>com.ververica</groupId>
   <artifactId>flink-connector-postgres-cdc</artifactId>
   <!-- The dependency is available only for stable releases, SNAPSHOT dependency need build by yourself. -->
-  <version>2.4-SNAPSHOT</version>
+  <version>2.4.0</version>
 </dependency>
 ```
 
 ### SQL Client JAR
 
 ```Download link is available only for stable releases.```
 
-Download [flink-sql-connector-postgres-cdc-2.4-SNAPSHOT.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-postgres-cdc/2.4-SNAPSHOT/flink-sql-connector-postgres-cdc-2.4-SNAPSHOT.jar) and put it under `<FLINK_HOME>/lib/`.
+Download [flink-sql-connector-postgres-cdc-2.4.0.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-postgres-cdc/2.4.0/flink-sql-connector-postgres-cdc-2.4.0.jar) and put it under `<FLINK_HOME>/lib/`.
 
 **Note:** flink-sql-connector-postgres-cdc-XXX-SNAPSHOT version is the code corresponding to the development branch. Users need to download the source code and compile the corresponding jar. Users should use the released version, such as [flink-sql-connector-postgres-cdc-2.3.0.jar](https://mvnrepository.com/artifact/com.ververica/flink-sql-connector-postgres-cdc), the released version will be available in the Maven central warehouse.