updated changelog for release

changelog.html

@@ -61,7 +61,10 @@ Upcoming changes</a>
 
 <!-- these changes are controlled by the release process. DO NOT MODIFY -->
 <div id="rc" style="display:none;"><!--=BEGIN=-->
-<h3><a name=v1.456>What's new in 1.456</a> <!--=DATE=--></h3>
+<h3><a name=v1.457>What's new in 1.457</a> <!--=DATE=--></h3>
+<!--=RC-CHANGES=-->
+</div><!--=END=-->
+<h3><a name=v1.456>What's new in 1.456</a> (2012/03/19)</h3>
 <ul class=image>
   <li class=bug>
     After renaming a job, the redirect goes to a wrong view.
@@ -98,7 +101,6 @@ Upcoming changes</a>
     Matrix project execution order is made pluggable.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-12778">issue 12778</a>)
 </ul>
-</div><!--=END=-->
 <h3><a name=v1.455>What's new in 1.455</a> (2012/03/12)</h3>
 <ul class=image>
   <li class=bug>