update bootstrap 4 demo link

Author: okendoken

README.md

@@ -143,7 +143,7 @@ Credits
 Based on the [Bootstrap][] and the awesome [Font Awesome][].
 
 
-[Demo]: http://flatlogic.github.io/awesome-bootstrap-checkbox/demo/1.0.0-alpha.1/
+[Demo]: http://flatlogic.github.io/awesome-bootstrap-checkbox/demo/1.0.0/
 [Bootstrap]: http://getbootstrap.com/
 [Bootstrap 4 Beta]: http://getbootstrap.com/
 [Font Awesome]: https://github.com/FortAwesome/Font-Awesome