docs(CHANGELOG): add more guidance on breaking changes

Author: mikehardy

CHANGELOG.md

@@ -26,9 +26,10 @@ See [Conventional Commits](https://conventionalcommits.org) for commit guideline
 
 ### BREAKING CHANGES
 
-* if you need READ_EXTERNAL_STORAGE/WRITE_EXTERNAL_STORAGE permission add them in your app AndroidManifest.xml
-* undefined values throw like firebase-js-sdk now. Use ignoreUndefinedProperties setting 'true' to behave as before
-
+* Storage: if you need READ_EXTERNAL_STORAGE/WRITE_EXTERNAL_STORAGE permission add them in your app AndroidManifest.xml
+* Firestore: undefined values throw like firebase-js-sdk now. Use ignoreUndefinedProperties setting 'true' to behave as before
+* AdMob: Removed from upstream SDKs. Stay on v11.5.0 for now if you need AdMob. `@invertase/react-native-admob` package planned with v11.5.0 code
+* ML: APIs removed from upstream SDKs. Migrate to cloud function / auth gateway to cloud APIs, as mentioned in links on ML usage document.