Update changelog

Author: adamwathan

CHANGELOG.md

@@ -41,6 +41,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - JIT: Fix temp file storage when node temp directories are kept on a different drive than the project itself ([#4044](https://github.com/tailwindlabs/tailwindcss/pull/4044))
 - Support border-opacity utilities alongside default `border` utility ([#4277](https://github.com/tailwindlabs/tailwindcss/pull/4277))
 - JIT: Fix source maps for expanded `@tailwind` directives ([2f15411](https://github.com/tailwindlabs/tailwindcss/commit/2f1541123dea29d8a2ab0f1411bf60c79eeb96b4))
+- JIT: Ignore whitespace when collapsing adjacent rules ([15642fb](https://github.com/tailwindlabs/tailwindcss/commit/15642fbcc885eba9cc50b7678a922b09c90d6b51))
+- JIT: Generate group parent classes correctly when using custom separator ([#4508](https://github.com/tailwindlabs/tailwindcss/pull/4508))
 
 ### Internals