Update contributor doc (#4966)

* Develop Flow => Developer Flow

* update contributor page

docs/community/content/contribute/contributor.en.md

@@ -16,11 +16,11 @@ You can report a bug, submit a new function enhancement suggestion, or submit a
  - Choose a label after issue created, for example: bug，enhancement，discussion.
  - Please pay attention for your issue, you may need provide more information during discussion.
 
-## Develop Flow
+## Developer Flow
 
-### Fork shardingsphere repo
+### Fork ShardingSphere repo
 
- - Fork a shardingsphere repo to your own repo to work, then setting upstream.
+ - Fork a `ShardingSphere` repo to your own repo to work, then setting upstream.
 
 ```shell
 git remote add upstream https://github.com/apache/incubator-shardingsphere.git