[FIXED JENKINS-8892]update changelog

changelog.html

@@ -69,6 +69,9 @@ Upcoming changes</a>
     (<a href="http://issues.jenkins-ci.org/browse/JENKINS-8892">issue 8892</a>)    
   <li class=rfe>
     Exposing more key variables to the Groovy CLI command.
+  <li class=rfe>
+    Allow classworlds.conf to be externally configured for M3 builds
+    (<a href="http://issues.jenkins-ci.org/browse/JENKINS-8905">issue 8905</a>)    
 </ul>
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