README: refine the Forum infomation format in community section

README.md

@@ -44,8 +44,7 @@ See the [Get Started](https://pingcap.github.io/tidb-dev-guide/get-started/intro
 You can join the following groups or channels to discuss or ask questions about TiDB, and to keep yourself informed of the latest TiDB updates:
 
 - Seek help when you use TiDB
-  - [TiDB Forum](https://ask.pingcap.com/)
-  - [Chinese TiDB Forum](https://asktug.com)
+  - TiDB Forum: [English](https://ask.pingcap.com/), [Chinese](https://asktug.com)
   - Slack channels: [#everyone](https://slack.tidb.io/invite?team=tidb-community&channel=everyone&ref=pingcap-tidb) (English), [#tidb-japan](https://slack.tidb.io/invite?team=tidb-community&channel=tidb-japan&ref=github-tidb) (Japanese)
   - [Stack Overflow](https://stackoverflow.com/questions/tagged/tidb) (questions tagged with #tidb)
 - Discuss TiDB's implementation and design