chore: update changelog

Author: ccharly

packages/multichain-account-service/CHANGELOG.md

@@ -9,7 +9,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
-- **BREAKING:** Bump peer dependency `@metamask/account-api` from `^0.3.0` to `^0.5.0` ([#6214](https://github.com/MetaMask/core/pull/6214))
+- **BREAKING:** Bump peer dependency `@metamask/account-api` from `^0.3.0` to `^0.6.0` ([#6214](https://github.com/MetaMask/core/pull/6214)), ([#6216](https://github.com/MetaMask/core/pull/6216))
+- **BREAKING:** Rename `MultichainAccount` to `MultichainAccountGroup` ([#6216](https://github.com/MetaMask/core/pull/6216))
+  - The naming was confusing and since a `MultichainAccount` is also an `AccountGroup` it makes sense to have the suffix there too.
+- **BREAKING:** Rename `getMultichainAccount*` to `getMultichainAccountGroup*` ([#6216](https://github.com/MetaMask/core/pull/6216))
+  - The naming was confusing and since a `MultichainAccount` is also an `AccountGroup` it makes sense to have the suffix there too.
 
 ## [0.3.0]