Add diff link for 1.22.0

Author: homebysix

CHANGELOG.md

@@ -447,7 +447,8 @@ Nothing yet.
 
 - Initial release
 
-[Unreleased]: https://github.com/homebysix/pre-commit-macadmin/compare/v1.21.0...HEAD
+[Unreleased]: https://github.com/homebysix/pre-commit-macadmin/compare/v1.22.0...HEAD
+[1.22.0]: https://github.com/homebysix/pre-commit-macadmin/compare/v1.21.0...v1.22.0
 [1.21.0]: https://github.com/homebysix/pre-commit-macadmin/compare/v1.20.0...v1.21.0
 [1.20.0]: https://github.com/homebysix/pre-commit-macadmin/compare/v1.19.0...v1.20.0
 [1.19.0]: https://github.com/homebysix/pre-commit-macadmin/compare/v1.18.0...v1.19.0