Fix Firebase/Auth version (#5106)

Author: paulb777

Firebase.podspec

@@ -71,7 +71,7 @@ Simplify your iOS development, grow your user base, and monetize more effectivel
 
   s.subspec 'Auth' do |ss|
     ss.dependency 'Firebase/CoreOnly'
-    ss.dependency 'FirebaseAuth', '~> 6.4.3'
+    ss.dependency 'FirebaseAuth', '~> 6.5.0'
   end
 
   s.subspec 'Crashlytics' do |ss|