chore: Update iOS platform version to 15.0 for google sign in

ios/Podfile

@@ -1,5 +1,5 @@
 # Uncomment this line to define a global platform for your project
-platform :ios, '14.0'
+platform :ios, '15.0'
 
 # CocoaPods analytics sends network stats synchronously affecting flutter build latency.
 ENV['COCOAPODS_DISABLE_STATS'] = 'true'

ios/Runner/AppDelegate.swift

@@ -8,7 +8,7 @@ import GoogleMaps
     _ application: UIApplication,
     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
   ) -> Bool {
-    GMSServices.provideAPIKey("AIzaSyBsgaG8PuDTFodn4xjGSjVDOxzw3gJB35A")
+    GMSServices.provideAPIKey("AIzaSyBSuFmXz5nNd9Y_9h52Rbp5U0qqNkscH4M")
     GeneratedPluginRegistrant.register(with: self)
     return super.application(application, didFinishLaunchingWithOptions: launchOptions)
   }