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!
+
+## [3.0.12] - 2022-01-07
+
 ### Fixed
 
 - Allow use of falsy values in theme config ([#6917](https://github.com/tailwindlabs/tailwindcss/pull/6917))
@@ -1788,7 +1792,8 @@ No release notes
 
 - Everything!
 
-[unreleased]: https://github.com/tailwindlabs/tailwindcss/compare/v3.0.11...HEAD
+[unreleased]: https://github.com/tailwindlabs/tailwindcss/compare/v3.0.12...HEAD
+[3.0.12]: https://github.com/tailwindlabs/tailwindcss/compare/v3.0.11...v3.0.12
 [3.0.11]: https://github.com/tailwindlabs/tailwindcss/compare/v3.0.10...v3.0.11
 [3.0.10]: https://github.com/tailwindlabs/tailwindcss/compare/v3.0.9...v3.0.10
 [3.0.9]: https://github.com/tailwindlabs/tailwindcss/compare/v3.0.8...v3.0.9