add missing quote to breadcrumb link (#8540)

templates/combo/page_template.html

@@ -34,7 +34,7 @@ class="page-{{ page.slug }}"
   <ol class="box-breadcrumb breadcrumb">
     {% for one_page in pages %}
       {% if not forloop.last %}
-      <li><a href={{one_page.get_online_url}}">{{one_page.title}}</a></li>
+      <li><a href="{{one_page.get_online_url}}">{{one_page.title}}</a></li>
       {% else %}
       <li class="active">{{one_page.title}}</li>
       {% endif %}