Add CDN link

Author: hata6502

README.md

@@ -21,10 +21,18 @@
 
 ## Install
 
+### Install via yarn
+
 ```sh
 yarn add editorjs-layout
 ```
 
+### Load from CDN
+
+```html
+<script src="https://cdn.jsdelivr.net/npm/editorjs-layout@latest"></script>
+```
+
 ## Usage
 
 Please see [demo HTML](https://github.com/hata6502/editorjs-layout/blob/main/docs/index.html).