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=v2.6>What's new in 2.6</a> (2016/05/22)</h3>
 <ul class=image>
   <li class="major rfe">
     Adapt the Setup Wizard GUI to provide a similar user experience when upgrading Jenkins. 
@@ -98,7 +103,6 @@ Upcoming changes</a>
     Internal: CLI command <code>connect-node</code> was extracted from the core to CLI. 
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-31417">issue 31417</a>)
 </ul>
-</div><!--=TRUNK-END=-->
 <h3><a name=v2.5>What's new in 2.5</a> (2016/05/16)</h3>
 <ul class=image>
   <li class="major bug">