docs: added first-purchase promotion guide (#12828)

www/apps/resources/app/integrations/page.mdx

@@ -242,6 +242,7 @@ A Notification Module Provider sends messages to users and customers in your Med
     }
   ]}
   className="mb-1"
+  itemsPerRow={2}
 />
 
 Learn how to integrate a third-party notification provider in the [Create Notification Module Provider](/references/notification-provider-module) documentation.