Update default.html

replace with object attributes

cmsplugin_embeddedmenu/templates/cmsplugin_embeddedmenu/layouts/containers/default.html

@@ -3,7 +3,7 @@
      class="cms-plugin cms-{{ plugin.plugin_type|slugify }}"
      data-plugin-position="{{ plugin.position }}">
 
-  <h3>{{ MenuTitle }}<small>{{ MenuSubtitle }}</small></h4>
+  <h3>{{ plugin.instance.menu_title }}<small>{{ plugin.instance.sub_title }}</small></h4>
   {% include plugin.instance.tree_template with Children=MenuItems %}
 
 </div>