Update README.md

Author: ulyssear

README.md

@@ -111,7 +111,7 @@ __Older browsers__
 
 1. Import `main.js` in your HTML file
    ```html
-   <script src="https://cdn.jsdelivr.net/gh/ulyssear/css-in-js-in-html@0.2.0/main.js"></script>
+   <script src="https://cdn.jsdelivr.net/gh/ulyssear/css-in-js-in-html@master/main.js"></script>
    ```
 
 2. Add one line of CSS to hide the page while building (and permits to hide elements with hidden attribute)