update changelog

Author: RobinMalfait

CHANGELOG.md

@@ -9,6 +9,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Nothing yet!
 
+## [2.2.2] - 2021-06-18
+
+- JIT: Reintroduce `transform`, `filter`, and `backdrop-filter` classes purely to create stacking contexts to minimize the impact of the breaking change ([#4700](https://github.com/tailwindlabs/tailwindcss/pull/4700))
+
 ## [2.2.1] - 2021-06-18
 
 ### Fixed
@@ -1438,7 +1442,8 @@ No release notes
 
 - Everything!
 
-[unreleased]: https://github.com/tailwindlabs/tailwindcss/compare/v2.2.1...HEAD
+[unreleased]: https://github.com/tailwindlabs/tailwindcss/compare/v2.2.2...HEAD
+[2.2.2]: https://github.com/tailwindlabs/tailwindcss/compare/v2.2.1...v2.2.2
 [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