link fix

rst/who_uses_ansible.rst

@@ -24,5 +24,5 @@ and lots of other people (you should see our Google Analytics data).  Tweet at `
        #ansible IRC chat channel
    `List of Github Contributors <https://github.com/ansible/ansible/graphs/contributors>`_
        all the awesome folks who have contributed improvements to Ansible
-   `Github Impact Graphs <https://github.com/ansible/ansible/graphs/impact>`
+   `Github Impact Graphs <https://github.com/ansible/ansible/graphs/impact>`_
        week-to-week source code activity, by contributor

who_uses_ansible.html

@@ -217,7 +217,7 @@ s.parentNode.insertBefore(ga, s);
 <dd>#ansible IRC chat channel</dd>
 <dt><a class="reference external" href="https://github.com/ansible/ansible/graphs/contributors">List of Github Contributors</a></dt>
 <dd>all the awesome folks who have contributed improvements to Ansible</dd>
-<dt><cite>Github Impact Graphs &lt;https://github.com/ansible/ansible/graphs/impact&gt;</cite></dt>
+<dt><a class="reference external" href="https://github.com/ansible/ansible/graphs/impact">Github Impact Graphs</a></dt>
 <dd>week-to-week source code activity, by contributor</dd>
 </dl>
 </div>