chore: reinstate firestore ios sdk in example app (#17574)

Author: SelaseKay

packages/cloud_firestore/cloud_firestore/example/ios/Podfile

@@ -51,8 +51,7 @@ target 'Runner' do
     end
   end
 
-  # TODO: Uncomment this when the binary distribution is working again
-  # pod 'FirebaseFirestore', :git => 'https://github.com/invertase/firestore-ios-sdk-frameworks.git', :tag => "#{firebase_sdk_version}"
+  pod 'FirebaseFirestore', :git => 'https://github.com/invertase/firestore-ios-sdk-frameworks.git', :tag => "#{firebase_sdk_version}"
 end
 
 post_install do |installer|

packages/cloud_firestore/cloud_firestore/example/macos/Podfile

@@ -50,8 +50,7 @@ target 'Runner' do
     end
   end
 
-  # TODO: Uncomment this when the binary distribution is working again
-  # pod 'FirebaseFirestore', :git => 'https://github.com/invertase/firestore-ios-sdk-frameworks.git', :tag => "#{firebase_sdk_version}"
+  pod 'FirebaseFirestore', :git => 'https://github.com/invertase/firestore-ios-sdk-frameworks.git', :tag => "#{firebase_sdk_version}"
 end
 
 post_install do |installer|