Update changelog.html

changelog.html

@@ -71,7 +71,7 @@ Upcoming changes</a>
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-31753">issue 31753</a>)
   <li class="rfe">
     Added missing translations for Polish language.
-    (<a href="https://github.com/jenkinsci/jenkins/pull/1986">issue 1986</a>)
+    (<a href="https://github.com/jenkinsci/jenkins/pull/1986">pull 1986</a>)
 </ul>
 <h3><a name=v1.645>What's new in 1.645</a> (2016/01/18)</h3>
 <ul class=image>