Update changelog

Author: adamwathan

CHANGELOG.md

@@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add combinable `touch-action` support ([#6115](https://github.com/tailwindlabs/tailwindcss/pull/6115))
 - Add support for "arbitrary properties" ([#6161](https://github.com/tailwindlabs/tailwindcss/pull/6161))
 - Add `portrait` and `landscape` variants ([#6046](https://github.com/tailwindlabs/tailwindcss/pull/6046))
+- Add `aspect-attrs` utility by default ([#6178](https://github.com/tailwindlabs/tailwindcss/pull/6178))
 
 ## [3.0.0-alpha.2] - 2021-11-08