aggiornato shields

README.md

@@ -7,7 +7,7 @@
 
 mailgo will substitute all the `mailto:` links with the **mailgo modal**, in less than 7KB
 
-![mailgo.min.js size](https://img.shields.io/github/size/manzinello/mailgo/dist/mailgo.min.js.svg?label=mailgo.min.js&style=popout-square)
+[![mailgo.min.js size](https://img.shields.io/github/size/manzinello/mailgo/dist/mailgo.min.js.svg?label=mailgo.min.js&style=flat-square)](https://cdn.jsdelivr.net/npm/mailgo@latest/dist/mailgo.min.js)
 
 <img src="assets/img/screen-1.png" alt="mailgo modal" width="200"/>