Update README.md

Author: phucbm

README.md

@@ -4,5 +4,5 @@ A jQuery plugin to detect scroll direction.
 ## CDN
 
 ```html
-<script src="https://cdn.jsdelivr.net/gh/phucbm/jquery-scroll-direction-plugin/jquery-scroll-direction-plugin.js"></script>
+<script src="https://cdn.jsdelivr.net/gh/phucbm/jquery-scroll-direction-plugin/jquery.scroll-direction.js"></script>
 ```