docs: update changelog

Author: kamadorueda

CHANGELOG.md

@@ -172,8 +172,8 @@ Types of changes
 ---
 
 [unreleased]: https://github.com/kamadorueda/alejandra/compare/0.3.1...HEAD
-[0.2.0]: https://github.com/kamadorueda/alejandra/compare/0.3.0...0.3.1
-[0.2.0]: https://github.com/kamadorueda/alejandra/compare/0.2.0...0.3.0
+[0.3.1]: https://github.com/kamadorueda/alejandra/compare/0.3.0...0.3.1
+[0.3.0]: https://github.com/kamadorueda/alejandra/compare/0.2.0...0.3.0
 [0.2.0]: https://github.com/kamadorueda/alejandra/compare/0.1.0...0.2.0
 [0.1.0]: https://github.com/kamadorueda/alejandra/compare/0.0.0...0.1.0
 [0.0.0]: https://github.com/kamadorueda/alejandra/compare/6adfbe8516bf6d9e896534e01118e1bc41f65425...0.0.0