Update README.

Author: kaustubhkagrawal

README.md

@@ -20,7 +20,7 @@ To add Vapi to your website, include the following javascript snippet in your HT
     var g = document.createElement(t),
       s = d.getElementsByTagName(t)[0];
     g.src =
-      "https://cdn.jsdelivr.net/gh/VapiAI/html-script-tag/dist/assets/index.js";
+      "https://cdn.jsdelivr.net/gh/VapiAI/html-script-tag@latest/dist/assets/index.js";
     g.defer = true;
     g.async = true;
     s.parentNode.insertBefore(g, s);