docs(firebase_messaging): Fix broken link to Firebase `TokenMessage` documentation. (#8317)
docs(firebase_messaging): Fix broken link to Firebase `TokenMessage` documentation. (#8317)


firebase/flutterfire,firebase/flutterfire,firebase/flutterfire,firebase/flutterfire,firebase/flutterfire,firebase/flutterfire,firebase/flutterfire,firebase/flutterfire,firebase/flutterfire,firebase/flutterfire