updated changelog for release

changelog.html

@@ -55,13 +55,17 @@ Upcoming changes</a>
 
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+<h3><a name=v2.46>What's new in 2.46</a> (2017/02/13)</h3>
 <ul class=image>
   <li class=bug>
     Failure to serialize a single <code>Action</code> could cause an entire REST export response to fail.
     Upgraded to Stapler <code>1.249</code> with a fix.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-40088">issue 40088</a>)
 </ul>
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 <h3><a name=v2.45>What's new in 2.45</a> (2017/02/06)</h3>
 <ul class=image>
   <li class=bug>