add extra new line

src/pages/[platform]/build-a-backend/data/custom-business-logic/batch-ddb-operations/index.mdx

@@ -115,6 +115,7 @@ The Amplify generated DynamoDB table names can be constructed from the variables
 
 ```ts title="amplify/data/BatchCreatePostHandler.js"
 import { util } from '@aws-appsync/utils';
+
 export function request(ctx) {
   var now = util.time.nowISO8601();