Fix Unreleased changelog link

Author: erickskrauch

CHANGELOG.md

@@ -145,7 +145,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Added
 - First release
 
-[Unreleased]: https://github.com/olivierlacan/keep-a-changelog/compare/0.4.0...HEAD
+[Unreleased]: https://github.com/elyby/php-code-style/compare/0.4.0...HEAD
 [0.4.0]: https://github.com/elyby/php-code-style/compare/0.3.0...0.4.0
 [0.3.0]: https://github.com/elyby/php-code-style/compare/0.2.1...0.3.0
 [0.2.1]: https://github.com/elyby/php-code-style/compare/0.2.0...0.2.1