Add missing DIV tag

Fix W3C errors:
- End tag section seen, but there were open elements
- Unclosed element div

index.html

@@ -146,6 +146,7 @@ permalink: index.html
                     <p>{% t home.researchlab_para %}</p>
                     <p><a href="{{site.baseurl}}/resources/research-lab/" class="btn-link btn-fixed">{% t home.visitmrl %}</a></p>
                 </div>
+           </div>
         </div>
     </section> 
     <!-- END Full Block -->