docs: add link to simplepdf.github.io

Author: bendersej

README.md

@@ -33,6 +33,7 @@ Add a powerful PDF editor directly into your website or React App.
 <a href="https://twitter.com/simple_pdf">Follow us on Twitter</a>
 </p>
 
+# [🔗 Try SimplePDF Embed](https://simplePDF.github.io)
 
 https://github.com/SimplePDF/simplepdf-embed/assets/10613140/8924f018-6076-4e44-9ae5-eedf9a740bb1