Fix changelog links

Co-Authored-By: Fabian Urrutia <[email protected]>

CHANGELOG.md

@@ -237,7 +237,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Everything!
 
-[unreleased]: https://github.com/tailwindlabs/heroicons/compare/v2.1.0...HEAD
+[unreleased]: https://github.com/tailwindlabs/heroicons/compare/v2.1.1...HEAD
+[2.1.1]: https://github.com/tailwindlabs/heroicons/compare/v2.1.0...v2.1.1
 [2.1.0]: https://github.com/tailwindlabs/heroicons/compare/v2.0.18...v2.1.0
 [2.0.18]: https://github.com/tailwindlabs/heroicons/compare/v2.0.17...v2.0.18
 [2.0.17]: https://github.com/tailwindlabs/heroicons/compare/v2.0.16...v2.0.17