fix: Arabic translation of Sign In With Apple button label

Author: MahMoos

packages/firebase_ui_localizations/lib/l10n/firebase_ui_ar.arb

@@ -309,7 +309,7 @@
     "description": "Used as a title of the LoginView when AuthAction is AuthAction.signIn.",
     "placeholders": {}
   },
-  "signInWithAppleButtonText": "تسجيل الدخول باستخدام حساب على Apple",
+  "signInWithAppleButtonText": "تسجيل الدخول باستخدام Apple",
   "@signInWithAppleButtonText": {
     "description": "Used as a label of the OAuthProviderButton for Apple provider.",
     "placeholders": {}

packages/firebase_ui_localizations/lib/src/lang/ar.dart

@@ -197,8 +197,7 @@ class ArLocalizations extends FirebaseUILocalizationLabels {
   String get signInText => "تسجيل الدخول";
 
   @override
-  String get signInWithAppleButtonText =>
-      "تسجيل الدخول باستخدام حساب على Apple";
+  String get signInWithAppleButtonText => "تسجيل الدخول باستخدام Apple";
 
   @override
   String get signInWithEmailLinkSentText =>