chore: add APIPluginOptions

Author: khatruong2009

src/pages/[platform]/build-a-backend/data/set-up-data/index.mdx

@@ -339,7 +339,11 @@ import 'models/ModelProvider.dart';
 Future<void> main() async {
   // highlight-start
   try {
-    final api = AmplifyAPI(modelProvider: ModelProvider.instance);
+    final api = AmplifyAPI(
+      options: APIPluginOptions(
+        modelRegistration: ModelProvider()
+        )
+      );
     await Amplify.addPlugins([api]);
     await Amplify.configure(outputs);