update changelog

Author: RobinMalfait

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- Nothing yet!
+
+## [2.2.1] - 2021-06-18
+
 ### Fixed
 
 - Recover from errors gracefully in CLI watch mode ([#4693](https://github.com/tailwindlabs/tailwindcss/pull/4693))
@@ -1434,7 +1438,8 @@ No release notes
 
 - Everything!
 
-[unreleased]: https://github.com/tailwindlabs/tailwindcss/compare/v2.2.0...HEAD
+[unreleased]: https://github.com/tailwindlabs/tailwindcss/compare/v2.2.1...HEAD
+[2.2.1]: https://github.com/tailwindlabs/tailwindcss/compare/v2.2.0...v2.2.1
 [2.2.0]: https://github.com/tailwindlabs/tailwindcss/compare/v2.1.4...v2.2.0
 [2.1.4]: https://github.com/tailwindlabs/tailwindcss/compare/v2.1.3...v2.1.4
 [2.1.3]: https://github.com/tailwindlabs/tailwindcss/compare/v2.1.2...v2.1.3