Update changelog

Author: adamwathan

CHANGELOG.md

@@ -15,15 +15,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Add scripts for generating a PostCSS 7 compatible build alongside PostCSS 8 version ([#2773](https://github.com/tailwindlabs/tailwindcss/pull/2773))
 
-### Fixed
+### Changed
 
-- Actually rename custom properties, made a git booboo
+- All custom properties have been internally namespaced under `tw-` to avoid collisions with end-user custom properties ([#2771](https://github.com/tailwindlabs/tailwindcss/pull/2771))
 
 ## [2.0.0-alpha.22] - 2020-11-16
 
 ### Changed
 
-- All custom properties have been internally namespaced under `tw-` to avoid collisions with end-user custom properties ([#2771](https://github.com/tailwindlabs/tailwindcss/pull/2771))
+- ~~All custom properties have been internally namespaced under `tw-` to avoid collisions with end-user custom properties ([#2771](https://github.com/tailwindlabs/tailwindcss/pull/2771))~~ I made a git boo-boo, check alpha.23 instead
 
 ## [2.0.0-alpha.21] - 2020-11-15