fix: oscp issue template (#6886)

Author: yvonneyx

.github/ISSUE_TEMPLATE/4.oscp.yml

@@ -1,13 +1,14 @@
 name: '✏️ OSCP Season of Docs'
 description: '通过开源社区的力量，共同打造更友好、更易上手的 AntV 文档 | Contribute to AntV G6 documentation with the power of open source community'
 labels: ['OSCP']
-title: '[OSCP][G6]: '
+projects: ['2025 AntV OSCP Season of Docs']
+title: '[Docs]: '
 body:
-  - type: markdown
+  - type: textarea
+    id: 'summary'
     attributes:
+      label: 任务介绍
       value: |
-        ### 任务介绍
-
         > 此 ISSUE 为 [AntV 开源共建计划（AntV Open Source Contribution Plan，简称 AntV OSCP）Phase3 - 文档季](https://github.com/antvis/G6/issues/6882)的任务 ISSUE，欢迎社区开发者参与共建~
         >  - 更多任务，可查看 [GitHub Project - 2025 AntV OSCP Season of Docs](https://github.com/orgs/antvis/projects/31)。