Update src/content/docs/workers/frameworks/framework-guides/nextjs.mdx

Co-authored-by: emily-shen <[email protected]>

Author: vicb

src/content/docs/workers/frameworks/framework-guides/nextjs.mdx

@@ -26,7 +26,7 @@ import {
 This is a simple getting started guide. For detailed documentation on how the to use the Cloudflare OpenNext adapter, visit the [OpenNext website](https://opennext.js.org/cloudflare).
 :::
 
-## What is Next.js
+## What is Next.js?
 
 [Next.js](https://nextjs.org/) is a [React](https://react.dev/) framework for building full stack applications. Think of React as the engine for building user interfaces (UIs) with components, while Next.js provides the chassis, structure, and additional features needed to build complete, production-ready web applications more easily and efficiently.