Update changelog.html

changelog entry for JENKINS-17858

changelog.html

@@ -55,6 +55,9 @@ Upcoming changes</a>
 <!-- Record your changes in the trunk here. -->
 <div id="trunk" style="display:none"><!--=TRUNK-BEGIN=-->
 <ul class=image>
+  <li class=rfe>
+    <f:dropdownDescriptorSelector> does not allow defaulting to specifig instance
+     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-17858">issue 17858</a>)
   <li class=bug>
     mark maven settings / global settings as default for new jobs
      (<a href="https://issues.jenkins-ci.org/browse/JENKINS-17723">issue 17723</a>)