docs: recommend set commitMessageTopic with packageRules (#19689)

docs/usage/configuration-options.md

@@ -408,8 +408,21 @@ Usually left empty except for internal use (multiple base branches, and vulnerab
 
 ## commitMessageTopic
 
-This is used to alter `commitMessage` and `prTitle` without needing to copy/paste the whole string.
-The "topic" is usually refers to the dependency being updated, e.g. `"dependency react"`.
+You can use `commitMessageTopic` to change the `commitMessage` and `prTitle` without copy/pasting the whole string.
+The "topic" usually refers to the dependency being updated, for example: `"dependency react"`.
+
+We recommend you use `matchManagers` and `commitMessageTopic` in a `packageRules` array to set the commit message topic, like this:
+
+```json
+{
+  "packageRules": [
+    {
+      "matchManagers": ["github-actions"],
+      "commitMessageTopic": "{{depName}}"
+    }
+  ]
+}
+```
 
 ## composerIgnorePlatformReqs