Use HTML5 <article> tag in duck's layout

i2p2www/pages/global/layout.html

@@ -41,7 +41,7 @@
 {%- if g.theme != "danimoth" %}
       <div id="content">
         {% block content_outer %}
-        <div class="inner">
+        <article class="inner">
           {%- if self.lastupdated() or self.accuratefor() -%}
           <div class="lastupdated">
             This page {% if self.lastupdated() %}was last updated in {% block lastupdated %}{% endblock %}{% endif -%}
@@ -50,7 +50,7 @@
           </div>
           {% endif %}
         {% block content %}{% endblock %}
-        </div>
+        </article>
       {% endblock %}
       </div>
       <footer>