removed misplaced closing li tag

Resources/views/standard_layout.html.twig

@@ -98,7 +98,7 @@ file that was distributed with this source code.
                                 </li>
                             {% endfor %}
                         </ul>
-                        <p class="pull-right">{% block user_block %}<a href="#">Login/Logout</a></li>{% endblock %}</p>
+                        <p class="pull-right">{% block user_block %}<a href="#">Login/Logout</a>{% endblock %}</p>
                     </div>
                 </div>
             </div>