Update docs link

Author: gitdagray

README.md

@@ -56,7 +56,7 @@
 
 ### 📚 References
 - 🔗 [Next.js Official Site](https://nextjs.org/)
-- 🔗 [Next.js 13 Beta Docs](https://beta.nextjs.org/docs)
+- 🔗 [Next.js 13 Docs](https://nextjs.org/docs)
 - 🔗 [Cloudflare: How does a CDN work?](https://www.cloudflare.com/learning/cdn/what-is-a-cdn/)
 - - 🔗 [What is MDX?](https://mdxjs.com/docs/what-is-mdx/)
 - 🔗 [next-mdx-remote RSC Docs](https://github.com/hashicorp/next-mdx-remote#react-server-components-rsc--nextjs-app-directory-support)