Update changelog

Author: adamwathan

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Ensure sourcemap input is deterministic when using `@apply` in Vue components ([#3356](https://github.com/tailwindlabs/tailwindcss/pull/3356))
 - Ensure placeholder opacity is consistent across browsers ([#3308](https://github.com/tailwindlabs/tailwindcss/pull/3308))
+- Add `cursor-help` by default ([#3199](https://github.com/tailwindlabs/tailwindcss/pull/3199))
 
 ## [2.0.2] - 2020-12-11