[partials/work-in-progress] Fix spurious </img>

themes/doublefourteen/layouts/partials/work-in-progress.html

@@ -5,6 +5,6 @@
       there is nothing to show in this category, <b>yet</b>...
     </p>
   </div>
-  <div class="work-in-progress-sign" title="Miku doesn't like to wait for new content."></img>
+  <div class="work-in-progress-sign" title="Miku doesn't like to wait for new content."></div>
   </div>
 </div>