update changelog

Author: mikesposito

packages/delegation-controller/CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
++- **BREAKING:** Use new `Messenger` from `@metamask/messenger` ([#6459](https://github.com/MetaMask/core/pull/6459))
++  - Previously, `DelegationController` accepted a `RestrictedMessenger` instance from `@metamask/base-controller`.
 - Bump `@metamask/base-controller` from `^8.1.0` to `^8.2.0` ([#6355](https://github.com/MetaMask/core/pull/6355))
 
 ## [0.7.0]