[NFC] improve doc

Author: flovent

clang-tools-extra/docs/ReleaseNotes.rst

@@ -184,7 +184,7 @@ Changes in existing checks
 
 - Improved :doc:`readability-container-size-empty
   <clang-tidy/checks/readability/container-size-empty>` check by correctly
-  generating fix hints when size method is inherited from parent class.
+  generating fix hints when size method is called from implicit this.
 
 - Improved :doc:`readability-identifier-naming
   <clang-tidy/checks/readability/identifier-naming>` check by ignoring