Update index.mdx

Author: mintlify-development[bot]

index.mdx

@@ -45,6 +45,10 @@ export const HeroCard = ({ filename, title, description, href }) => {
       Meet the next generation of documentation. AI-native, beautiful out-of-the-box, and built for developers.
     </div>
 
+    <div className="max-w-xl mx-auto px-4 mt-6 text-center">
+      <p className="text-2xl font-semibold text-gray-900 dark:text-zinc-50">Hello World</p>
+    </div>
+
     <div className="px-6 lg:px-0 mt-12 lg:mt-24 grid sm:grid-cols-2 gap-x-6 gap-y-4">
       <HeroCard filename="rocket" title="Quickstart" description="Deploy your first docs site in minutes with our step-by-step guide" href="/quickstart" />