Update CHANGELOG.md

Author: pedrottimark

CHANGELOG.md

@@ -12,6 +12,7 @@
 - `[expect]` Improve report when negative CalledWith assertion fails ([#8755](https://github.com/facebook/jest/pull/8755))
 - `[expect]` Improve report when positive CalledWith assertion fails ([#8771](https://github.com/facebook/jest/pull/8771))
 - `[expect]` Display equal values for ReturnedWith similar to CalledWith ([#8791](https://github.com/facebook/jest/pull/8791))
+- `[expect, jest-snapshot]` Change color from green for some args in matcher hints ([#8812](https://github.com/facebook/jest/pull/8812))
 - `[jest-snapshot]` Highlight substring differences when matcher fails, part 3 ([#8569](https://github.com/facebook/jest/pull/8569))
 - `[jest-core]` Improve report when snapshots are obsolete ([#8448](https://github.com/facebook/jest/pull/8665))
 - `[jest-cli]` Improve chai support (with detailed output, to match jest exceptions) ([#8454](https://github.com/facebook/jest/pull/8454))