Fix markup errors on "What We Do" causing layout issues.

www/conservancy/static/activities/index.html

@@ -49,7 +49,7 @@
            cultures.  We are thus the proud home of
            the <a href="https://outreachy.org/">Outreachy initiative</a> that
            offers paid internships in FOSS for contributors who have faced
-           systemic bias in their efforts to join the FOSS community.<p>
+           systemic bias in their efforts to join the FOSS community.</p>
            {% endblock %}
          </div>
          <div id="sidebar" class="{% block submenuselection %}{% endblock %}">
@@ -70,4 +70,5 @@
             </ul>
          </div>
     </div>
+</div>
 {% endblock %}