templates/wiki_page: Remove <p> element

The <p> element at this level are wrong, because the StreamField blocks
will add their own <p> elements and nested <p> elements are not legal.
This structural errors makes the fallback text in a <video> element
visible, even when the video is playable.

Remove <p> element.

mpicms/templates/base/wiki_page.html

@@ -15,10 +15,8 @@ <h2 class="title is-2">{{ page.title }}</h2>
     {% endif %}
 
     <div id="content" class="content">
-        <p>
             {% for block in page.body %}
                 {% include_block block %}
             {% endfor %}
-        </p>
     </div>
-{% endblock %}
+{% endblock %}