mark new scrollbar utilities as experimental

Author: RobinMalfait

CHANGELOG.md

@@ -10,7 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - _Experimental_: add `@container-size` utility ([#18901](https://github.com/tailwindlabs/tailwindcss/pull/18901))
-- Add `scrollbar-{auto,thin,none}` utilities for `scrollbar-width`, and `scrollbar-thumb-*` / `scrollbar-track-*` color utilities for `scrollbar-color`
+- _Experimental_: add `scrollbar-{auto,thin,none}` utilities for `scrollbar-width`, and `scrollbar-thumb-*` / `scrollbar-track-*` color utilities for `scrollbar-color`
 
 ### Fixed