Use module for the type of the main navigation

Author: Xpirix

django_project/core/base_templates/base.html

@@ -30,7 +30,7 @@
             data-close-text="Got it!">
     </script>
 
-    <script type="text/javascript" src="https://qgis.github.io/qgis-uni-navigation/index.js"></script>
+    <script type="module" src="https://qgis.github.io/qgis-uni-navigation/index.js"></script>
     {% block js_head %}{% endblock js_head %}
     {% block css_head %}{% endblock css_head %}