updated changelog for release

changelog.html

@@ -55,6 +55,11 @@ Upcoming changes</a>
 
 <!-- Record your changes in the trunk here. -->
 <div id="trunk" style="display:none"><!--=TRUNK-BEGIN=-->
+<ul class=image>
+  <li class=>
+</ul>
+</div><!--=TRUNK-END=-->
+<h3><a name=v2.4>What's new in 2.4</a> (2016/05/15)</h3>
 <ul class=image>
   <li class=rfe>
     Internal/build: <code>jenkins-ui</code> (NPM module) is private, used only internally.
@@ -166,7 +171,6 @@ Upcoming changes</a>
     (Controlled by <a href="https://wiki.jenkins-ci.org/display/JENKINS/Features+controlled+by+system+properties">PROTOCOL_CLASS_NAME.disabled</a>)
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-34819">issue 34819</a>)
 </ul>
-</div><!--=TRUNK-END=-->
 <h3><a name=v2.3>What's new in 2.3</a> (2016/05/11)</h3>
 <ul class=image>
   <li class="major bug">