Update changelog

Author: thecrypticace

CHANGELOG.md

@@ -32,6 +32,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fix not matching arbitrary properties when closely followed by square brackets ([#10212](https://github.com/tailwindlabs/tailwindcss/pull/10212))
 - Allow direct nesting in `root` or `@layer` nodes ([#10229](https://github.com/tailwindlabs/tailwindcss/pull/10229))
 - Don't prefix classes in arbitrary variants ([#10214](https://github.com/tailwindlabs/tailwindcss/pull/10214))
+- Fix perf regression when checking for changed content ([#10234](https://github.com/tailwindlabs/tailwindcss/pull/10234))
 
 ### Changed