chore: update quickstart android project files

examples/flutter/quickstart/android/app/build.gradle

@@ -23,7 +23,7 @@ android {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId = "com.example.quickstart"
         // You can update the following values to match your application needs.
-        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
+        // For more information, see: https://flutter.dev/to/review-gradle-config.
         minSdk = 22
         targetSdk = flutter.targetSdkVersion
         versionCode = flutter.versionCode