updated changelog for release

changelog.html

@@ -55,6 +55,11 @@ Upcoming changes</a>
 
 <!-- Record your changes in the trunk here. -->
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+<ul class=image>
+  <li class=>
+</ul>
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+<h3><a name=v2.11>What's new in 2.11</a> (2016/06/26)</h3>
 <ul class=image>
   <li class=rfe>
     Provide an extension point for SCM decisions such as whether to poll a specific job's backing
@@ -62,7 +67,6 @@ Upcoming changes</a>
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-36123">Issue 36123</a>)
   <li class=>
 </ul>
-</div><!--=TRUNK-END=-->
 <h3><a name=v2.10>What's new in 2.10</a> (2016/06/19)</h3>
 <ul class=image>
   <li class=rfe>