refactor(auth api): add CHANGES.md

Author: spaceluke

CHANGES.md

@@ -5,7 +5,7 @@ Release Notes.
 Apollo 2.5.0
 
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-* 
+* [Refactor: align permission validator api between openapi and portal](https://github.com/apolloconfig/apollo/pull/5337)
 
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 All issues and pull requests are [here](https://github.com/apolloconfig/apollo/milestone/16?closed=1)