Docs: Update sentence about Next.js static export (#5837)

* Update sentence about static export

Support for static exports will be available in v13.3 (coming soon)

* Add also*

src/content/learn/start-a-new-react-project.md

@@ -91,8 +91,7 @@ These features are getting closer to being production-ready every day, and we've
 
 **[Next.js's App Router](https://beta.nextjs.org/docs/getting-started) is a redesign of the Next.js APIs aiming to fulfill the React team’s full-stack architecture vision.** It lets you fetch data in asynchronous components that run on the server or even during the build.
 
-Next.js is maintained by [Vercel](https://vercel.com/). You can [deploy a Next.js app](https://nextjs.org/docs/deployment) to any Node.js or serverless hosting, or to your own server. Static export is [planned but not yet supported](https://beta.nextjs.org/docs/app-directory-roadmap#configuration) in the Next.js's App Router.
+Next.js is maintained by [Vercel](https://vercel.com/). You can [deploy a Next.js app](https://nextjs.org/docs/deployment) to any Node.js or serverless hosting, or to your own server. Next.js also supports [static export](https://beta.nextjs.org/docs/configuring/static-export) which doesn't require a server.
-
 <Pitfall>
 
 Next.js's App Router is **currently in beta and is not yet recommended for production** (as of Mar 2023). To experiment with it in an existing Next.js project, [follow this incremental migration guide](https://beta.nextjs.org/docs/upgrade-guide#migrating-from-pages-to-app).