fix doc

Author: shiyuhang0

docs/userguide_3.0.md

@@ -238,7 +238,7 @@ spark.sql("select t1.id,t2.id from spark_catalog.default.t t1 left join tidb_cat
 |------------------------------------------------|------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
 | `spark.tispark.pd.addresses`                   | `127.0.0.1:2379` | The addresses of PD cluster, which are split by comma                                                                                                                                                                                                                                                                                                                                                                                               |
 | `spark.tispark.grpc.framesize`                 | `2147483647`     | The maximum frame size of gRPC response in bytes (default 2G)                                                                                                                                                                                                                                                                                                                                                                                       |
-| `spark.tispark.grpc.timeout_in_sec`            | `10`             | The gRPC timeout time in seconds                                                                                                                                                                                                                                                                                                                                                                                                                    |
+| `spark.tispark.grpc.timeout_in_sec`            | `180`            | The gRPC timeout time in seconds                                                                                                                                                                                                                                                                                                                                                                                                                    |
 | `spark.tispark.plan.allow_agg_pushdown`        | `true`           | Whether aggregations are allowed to push down to TiKV (in case of busy TiKV nodes)                                                                                                                                                                                                                                                                                                                                                                  |
 | `spark.tispark.plan.allow_index_read`          | `true`           | Whether index is enabled in planning (which might cause heavy pressure on TiKV)                                                                                                                                                                                                                                                                                                                                                                     |
 | `spark.tispark.index.scan_batch_size`          | `20000`          | The number of row key in batch for the concurrent index scan                                                                                                                                                                                                                                                                                                                                                                                        |