update changelog

Author: RobinMalfait

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Ensure individual logical property utilities are sorted later than left/right pair utilities ([#14777](https://github.com/tailwindlabs/tailwindcss/pull/14777))
 - _Upgrade (experimental)_: Ensure `@import` statements for relative CSS files are actually migrated to use relative path syntax ([#14769](https://github.com/tailwindlabs/tailwindcss/pull/14769))
+- _Upgrade (experimental)_: Improve injection of the border compatibility CSS ([#14773](https://github.com/tailwindlabs/tailwindcss/pull/14773))
 
 ## [4.0.0-alpha.29] - 2024-10-23