Update changelog

Author: thecrypticace

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Don't scan `.geojson` files for classes by default ([#17700](https://github.com/tailwindlabs/tailwindcss/pull/17700))
 - Hide default shadow suggestions when missing theme keys ([#17743](https://github.com/tailwindlabs/tailwindcss/pull/17743))
+- Replace `_` with `.` in theme suggestions for `@utility` if surrounded by digits ([#17743](https://github.com/tailwindlabs/tailwindcss/pull/17743))
 
 ## [4.1.4] - 2025-04-14