chore: update associated domains to example app

Author: russellwheatley

samples/swiftui/FirebaseSwiftUIExample/FirebaseSwiftUIExample/FirebaseSwiftUIExample.entitlements

@@ -11,6 +11,7 @@
 	<key>com.apple.developer.associated-domains</key>
 	<array>
 		<string>applinks:flutterfire-e2e-tests.firebaseapp.com</string>
+		<string>applinks:flutterfiretests.page.link</string>
 	</array>
 </dict>
 </plist>