[JENKINS-12529] add changelog entry

changelog.html

@@ -58,7 +58,9 @@ Upcoming changes</a>
   <li class=rfe>
     job rows in view should have id= for easy access
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-12490">issue 12518</a>)
-  <li class=>
+  <li class=ref>
+    M2 job: create links to codehaus maven plugins and their goals
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-12529">issue 12529</a>)  
 </ul>
 </div><!--=TRUNK-END=-->