update predictions config (#8255)

src/pages/[platform]/build-a-backend/add-aws-services/predictions/set-up-predictions/index.mdx

@@ -154,7 +154,13 @@ Import and load the configuration file in your app. It is recommended you add th
 
 ```ts title="src/main.ts"
 import { Amplify } from "aws-amplify";
+import { parseAmplifyConfig } from "aws-amplify/utils";
 import outputs from '../amplify_outputs.json';
 
-Amplify.configure(outputs);
+const amplifyConfig = parseAmplifyConfig(outputs);
+
+Amplify.configure({
+  ...amplifyConfig,
+  Predictions: outputs.custom.Predictions,
+});
 ```