move to defineFunction

Author: ykethan

src/pages/[platform]/build-a-backend/functions/examples/s3-upload-confirmation/index.mdx

@@ -44,10 +44,10 @@ import { defineFunction, defineStorage } from "@aws-amplify/backend";
 
 export const storage = defineStorage({
   name: 'myProjectFiles',
-  resourceGroupName: "storage",
   triggers: {
     onUpload: defineFunction({
       entry: './on-upload-handler.ts'
+      resourceGroupName: 'storage',
     })
   }
 });