[Doc] Automatically signed-off by PyCharm (#20120)

Signed-off-by: wang.yuqi <noooop@126.com>

docs/contributing/README.md

@@ -151,6 +151,11 @@ the terms of the DCO.
 
 Using `-s` with `git commit` will automatically add this header.
 
+!!! tip
+    If you develop using PyCharm, there is a `Show Commit Options` icon to the right of the `Commit and Push...` button in the `Commit` window.
+    Opening it will bring up a `git` window where you can modify the `Author` and enable `Sign-off commit`.
+    This ensures that all your commits are automatically signed-off by PyCharm.
+
 ### PR Title and Classification
 
 Only specific types of PRs will be reviewed. The PR title is prefixed