Prepare changelog for v3.0.2. (#777)

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## v3.0.2
+- [Add input `set-safe-directory`](https://github.com/actions/checkout/pull/770)
+
 ## v3.0.1
 - [Fixed an issue where checkout failed to run in container jobs due to the new git setting `safe.directory`](https://github.com/actions/checkout/pull/762)
 - [Bumped various npm package versions](https://github.com/actions/checkout/pull/744)