Fix changelog links

changelog.html

@@ -62,19 +62,19 @@ Upcoming changes</a>
 <ul class=image>
   <li class="bug">
     More compact representation of redundant build causes.
-    (<a href-"https://issues.jenkins-ci.org/browse/JENKINS-33467">issue 33467</a>)
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-33467">issue 33467</a>)
 </ul>
 <h3><a name=v1.652>What's new in 1.652</a> (2016/03/06)</h3>
 <ul class=image>
   <li class="bug">
     Under some conditions Jenkins startup could fail because of incorrectly linked extensions; now recovering more gracefully.
-    (<a href-"https://issues.jenkins-ci.org/browse/JENKINS-25440">issue 25440</a>)
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-25440">issue 25440</a>)
 </ul>
 <h3><a name=v1.651>What's new in 1.651</a> (2016/02/28)</h3>
 <ul class=image>
   <li class="rfe">
     Move periodic task log files from <code>JENKINS_HOME/*.log</code> to <code>JENKINS_HOME/logs/tasks/*.log</code> and rotate them periodically rather than overwrite every execution.
-    (<a href-"https://issues.jenkins-ci.org/browse/JENKINS-33068">issue 33068</a>)
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-33068">issue 33068</a>)
   <li class="bug">
     Fix documentation of proxy configuration.
     (<a href="https://github.com/jenkinsci/jenkins/pull/2060">pull 2060</a>)