Add module to script in license page (#1691)

Co-authored-by: unknown <a.jakubowski@mdbootstrap.com>

site/content/general/license/index-js.html

@@ -2,7 +2,7 @@
 ---
 
 <script src="https://www.google.com/recaptcha/api.js?render={{< recaptcha-public-key >}}"></script>
-<script>
+<script type="module">
   const contactForm = document.querySelector("#contactFormLicense");
   const copyMessageCheckbox = document.querySelector("#copyMessage");