Enhance code coverage bot message. (#2235)

* enhance code coverage bot message.

* enhance code coverage bot message.

* enhance code coverage bot message.

* enhance code coverage bot message.

* PR feedback.

Author: codemzs

codecov.yml

@@ -11,7 +11,7 @@ coverage:
     - "build/::/"
 
 comment:
-  layout: "diff,flags"
+  layout: "diff, flags, files"
 
 flags:
   production: