Make the Release Notes link visible (#3092)

* show link

* Unpublish legacy RN page

* clean up

Author: markzegarelli

src/_includes/menu/menu.html

@@ -26,15 +26,15 @@
           </a>
         </li>
 
-        <!-- <li class="menu-item {% if currentPage == "release-notes" %}menu-item--active{% endif %}">
+        <li class="menu-item">
           <a class="menu-item__link menu-item__link--highlight menu-item__link--icon flex flex--middle" href="https://segment.com/release-notes/" target="_blank">
             <div class="menu-item__icon flex__column">
               {% include icons/megaphone.svg %}
             </div>
 
             <div class="flex__column">Release Notes</div>
           </a>
-        </li> -->
+        </li>
 
         <li class="menu-item menu-item--separated">
           <a class="menu-item__link menu-item__link--small menu-item__link--highlight" href="https://segment.com/">Back to Segment.com</a>