[JENKINS-6958] Added changelog.

changelog.html

@@ -57,6 +57,9 @@ Upcoming changes</a>
 <ul class=image>
   <li class=bug>
     Fixed the concurrent modification exception in classloading during startup
+  <li class=bug>
+    Show an error message if no name is provided when creating a job (CLI)
+    (<a href="http://issues.jenkins-ci.org/browse/JENKINS-6958">issue 6958</a>)
 </ul>
 </div><!--=TRUNK-END=-->