docs(readme): add websites built with ratzilla (#43)

README.md

@@ -136,6 +136,12 @@ Now go to [http://localhost:8080](http://localhost:8080) and enjoy TUIs in your
 - [Animations](https://github.com/orhun/ratzilla/tree/main/examples/animations) ([Preview](https://orhun.dev/ratzilla/animations))
 - [World Map](https://github.com/orhun/ratzilla/tree/main/examples/world_map) ([Preview](https://orhun.dev/ratzilla/world_map))
 
+## Websites built with Ratzilla
+
+- <https://orhun.dev/ratzilla> - The official website of Ratzilla
+- <https://terminalcollective.org> - Terminal Collective community website
+- <https://map.apt-swarm.orca.toys> - Map of apt-swarm p2p locations
+
 ## Acknowledgements
 
 Thanks to [Webatui] projects for the inspiration and the initial implementation of the essential parts of DOM backend.