Changelog update

Author: crswll

CHANGELOG.md

@@ -24,6 +24,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Improve error messages when encountering invalid functional utility names ([#18568](https://github.com/tailwindlabs/tailwindcss/pull/18568))
 - Don’t output CSS objects with false or undefined in the AST ([#18571](https://github.com/tailwindlabs/tailwindcss/pull/18571))
 - Add option to disable url rewriting in `@tailwindcss/postcss` ([#18321](https://github.com/tailwindlabs/tailwindcss/pull/18321))
+- Add `--border-color` to `divide` theme keys. ([#18704](https://github.com/tailwindlabs/tailwindcss/pull/18704/))
 
 ## [4.1.11] - 2025-06-26