Update changelog

Author: thecrypticace

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Ensure complex variants with multiple classes work ([#6311](https://github.com/tailwindlabs/tailwindcss/pull/6311))
 - Re-add `default` interop to public available functions ([#6348](https://github.com/tailwindlabs/tailwindcss/pull/6348))
 - Detect circular dependencies when using `@apply` ([#6365](https://github.com/tailwindlabs/tailwindcss/pull/6365))
+- Fix defaults optimization when vendor prefixes are involved ([#6369](https://github.com/tailwindlabs/tailwindcss/pull/6369))
 
 ## [3.0.0] - 2021-12-09