Added a menu link to API information. Tweaked a menu item text.

- Legacy-Id: 14971

ietf/templates/base/menu.html

@@ -140,7 +140,8 @@
     </ul>
   </li>
   <li><a href="/group/edu/materials/">Tutorials</a></li>
-  <li><a href="{% url 'ietf.release.views.release' %}">Datatracker releases</a></li>
+  <li><a href="/api/">API Help</a></li>  
+  <li><a href="{% url 'ietf.release.views.release' %}">Release notes</a></li>
   {% if flavor == "top" %}<li class="divider hidden-xs"></li>{% endif %}
   <li><a href="https://tools.ietf.org/tools/ietfdb/newticket"><span class="fa fa-bug"></span> Report a bug</a></li>
 {% if flavor == "top" %}</ul>{% endif %}