Update documentation with the new jetty.util.ajax bundle

Change-Id: I11a32a1fdaa1fadf103dda4f7102c44d3f10cb3a
diff --git a/bundles/org.eclipse.rap.doc/guide/articles/launcher.html b/bundles/org.eclipse.rap.doc/guide/articles/launcher.html
index 51075d2..e101f91 100644
--- a/bundles/org.eclipse.rap.doc/guide/articles/launcher.html
+++ b/bundles/org.eclipse.rap.doc/guide/articles/launcher.html
@@ -266,6 +266,7 @@
     <li><em>org.eclipse.jetty.server</em></li>
     <li><em>org.eclipse.jetty.servlet</em></li>
     <li><em>org.eclipse.jetty.util</em></li>
+    <li><em>org.eclipse.jetty.util.ajax</em></li>
   </ul>
 
   <p>