chore: update CODEOWNERS

Author: ccharly

.github/CODEOWNERS

@@ -119,6 +119,8 @@
 /packages/logging-controller/CHANGELOG.md         @MetaMask/confirmations @MetaMask/core-platform
 /packages/message-manager/package.json            @MetaMask/confirmations @MetaMask/core-platform
 /packages/message-manager/CHANGELOG.md            @MetaMask/confirmations @MetaMask/core-platform
+/packages/multichain-account-controller/package.json @MetaMask/accounts-engineers @MetaMask/core-platform
+/packages/multichain-account-controller/CHANGELOG.md @MetaMask/accounts-engineers @MetaMask/core-platform
 /packages/multichain-api-middleware/package.json  @MetaMask/wallet-api-platform-engineers @MetaMask/core-platform
 /packages/multichain-api-middleware/CHANGELOG.md  @MetaMask/wallet-api-platform-engineers @MetaMask/core-platform
 /packages/name-controller/package.json            @MetaMask/confirmations @MetaMask/core-platform