fix changelog link

Author: Siedlerchr

CHANGELOG.md

@@ -1108,7 +1108,7 @@ The changelog of JabRef 4.x is available at the [v4.3.1 tag](https://github.com/
 The changelog of JabRef 3.x is available at the [v3.8.2 tag](https://github.com/JabRef/jabref/blob/v3.8.2/CHANGELOG.md).
 The changelog of JabRef 2.11 and all previous versions is available as [text file in the v2.11.1 tag](https://github.com/JabRef/jabref/blob/v2.11.1/CHANGELOG).
 
-[5.10]: https://github.com/JabRef/jabref/compare/v5.9...v5.10´
+[5.10]: https://github.com/JabRef/jabref/compare/v5.9...v5.10
 [5.9]: https://github.com/JabRef/jabref/compare/v5.8...v5.9
 [5.8]: https://github.com/JabRef/jabref/compare/v5.7...v5.8
 [5.7]: https://github.com/JabRef/jabref/compare/v5.6...v5.7
@@ -1121,5 +1121,4 @@ The changelog of JabRef 2.11 and all previous versions is available as [text fil
 [5.0]: https://github.com/JabRef/jabref/compare/v5.0-beta...v5.0
 [5.0-beta]: https://github.com/JabRef/jabref/compare/v5.0-alpha...v5.0-beta
 [5.0-alpha]: https://github.com/JabRef/jabref/compare/v4.3...v5.0-alpha
-
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