Update changelog

Author: bradlc

CHANGELOG.md

@@ -13,6 +13,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Preserve source maps for generated CSS ([#7588](https://github.com/tailwindlabs/tailwindcss/pull/7588))
 - Split box shadows on top-level commas only ([#7479](https://github.com/tailwindlabs/tailwindcss/pull/7479))
 
+### Changed
+
+- Replace `chalk` with `picocolors` ([#6039](https://github.com/tailwindlabs/tailwindcss/pull/6039))
+
 ## [3.0.23] - 2022-02-16
 
 ### Fixed