fix: update CHANGELOG

Author: mathieuartu

packages/multichain-account-service/CHANGELOG.md

@@ -11,7 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Allow custom account providers ([#6231](https://github.com/MetaMask/core/pull/6231))
   - You can now pass an extra option `providers` in the service's constructor.
-- Add multichain account group creation support ([#6222](https://github.com/MetaMask/core/pull/6222)), ([#6238](https://github.com/MetaMask/core/pull/6238))
+- Add multichain account group creation support ([#6222](https://github.com/MetaMask/core/pull/6222)), ([#6238](https://github.com/MetaMask/core/pull/6238)), ([#6240](https://github.com/MetaMask/core/pull/6240))
   - This includes the new actions `MultichainAccountService:createNextMultichainAccountGroup` and `MultichainAccountService:createMultichainAccountGroup`.
 - Export `MultichainAccountWallet` and `MultichainAccountGroup` types ([#6220](https://github.com/MetaMask/core/pull/6220))