Update README.md

- Add link to CSS Canvas.

Author: Gigabyte5671

README.md

@@ -2,6 +2,8 @@
 
 An optimized editor, just for CSS.
 
+Used by [CSS Canvas](https://css-canvas.zakweb.dev/).
+
 Try it out with the [demo](https://css-editor.zakweb.dev/).
 
 ## Installation