Add Astro (#914)

Author: zakarialaoui10

README.md

@@ -1009,6 +1009,7 @@ There're also some great commercial libraries, like [amchart](https://www.amchar
 * [Docusaurus](https://github.com/facebook/docusaurus) - React-based static site generator by Facebook, ideal for content-centric websites.
 * [Next.js](https://github.com/vercel/next.js) - React powered static site generator, and they say "All the tools you need to make the Web. Faster.".
 * [Lume](https://github.com/lumeland/lume) - Static site generator for Deno.
+* [Astro](https://github.com/withastro/astro) - The web framework for content-driven websites.
 
 ## SDK