Update CHANGELOG.md

Author: reinink

CHANGELOG.md

@@ -19,7 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
-- Insert always on defaults layer in correct spot ([#6526](https://github.com/tailwindlabs/tailwindcss/pull/6526))
+- Insert always-on defaults layer in correct spot ([#6526](https://github.com/tailwindlabs/tailwindcss/pull/6526))
 
 ## [3.0.3] - 2021-12-15