add changelog for capability of maven plugin to use settings provided by config provider plugin

changelog.html

@@ -63,6 +63,8 @@ Upcoming changes</a>
   <li class=rfe>
     Added API token support.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-9363">issue 9363</a>)
+  <li class=rfe>
+    Maven Plugin can use settings files provided by the config provider plugin
 </ul>
 </div><!--=TRUNK-END=-->