fix(deps): update dependency flutter_facebook_auth to v7

Author: renovate[bot]

pubspec.yaml

@@ -20,7 +20,7 @@ dependencies:
   # Firebase Authentications
   google_sign_in: ^6.1.4
   sign_in_with_apple: ^5.0.0
-  flutter_facebook_auth: ^6.0.4
+  flutter_facebook_auth: ^7.0.0
 
   # logging
   logger: ^1.4.0