docs: fix sidenav typo

          </a></div>

        <ul>

          <li><a href="<?cs var:toroot ?>training/enterprise/device-management-policy.html">

            <span class="en">Enhancing Secirity with Device Management Policies</span>

            <span class="en">Enhancing Security with Device Management Policies</span>

          </a>

          </li>

        </ul>