Update CHANGELOG.md

CHANGELOG.md

@@ -128,6 +128,8 @@ Note that this project **does not** adhere to [Semantic Versioning](http://semve
 - We fixed an issue where the blue and red text colors in the Merge entries dialog were not quite visible [#6334](https://github.com/JabRef/jabref/issues/6334)
 - We fixed an issue where underscore character was removed from the file name in the Recent Libraries list in File menu [#6383](https://github.com/JabRef/jabref/issues/6383)
 - We fixed an issue where few keyboard shortcuts regarding new entries were missing [#6403](https://github.com/JabRef/jabref/issues/6403)
+- We fixed an issue that showing teh duplicate information more clear [#6488]
+(https://github.com/JabRef/jabref/issues/6488)
 ### Removed
 
 - Ampersands are no longer escaped by default in the `bib` file. If you want to keep the current behaviour, you can use the new "Escape Ampersands" formatter as a save action. [#5869](https://github.com/JabRef/jabref/issues/5869)