Fix changelog links

Author: antonkomarev

CHANGELOG.md

@@ -123,7 +123,8 @@ All notable changes to `cybercog/laravel-ownership` will be documented in this f
 
 - Initial release
 
-[Unreleased]: https://github.com/cybercog/laravel-ownership/compare/5.3.0...master
+[Unreleased]: https://github.com/cybercog/laravel-ownership/compare/5.4.0...master
+[5.4.0]: https://github.com/cybercog/laravel-ownership/compare/5.3.0...5.4.0
 [5.3.0]: https://github.com/cybercog/laravel-ownership/compare/5.2.0...5.3.0
 [5.2.0]: https://github.com/cybercog/laravel-ownership/compare/5.1.0...5.2.0
 [5.1.0]: https://github.com/cybercog/laravel-ownership/compare/5.0.0...5.1.0