update links for 2018-09 release

Change-Id: I147748d284240148619ebbea4d3d2fc3a81632f1
Signed-off-by: Eric Poirier <eric.poirier@eclipse-foundation.org>
diff --git a/content/en_index.php b/content/en_index.php
index 74f3933..cb2f656 100644
--- a/content/en_index.php
+++ b/content/en_index.php
@@ -93,10 +93,10 @@
       <h1>Read Doc</h1>
       <p>Documentation is a great resource to get you started with the Eclipse IDE.</p>
       <ul>
-        <li>Getting Started with the <a href="http://help.eclipse.org/photon/nav/0">Eclipse IDE User Guide</a></li>
-        <li>Getting Started with <a href="http://help.eclipse.org/photon/nav/1">Java development</a></li>
+        <li>Getting Started with the <a href="http://help.eclipse.org/2018-09/nav/0">Eclipse IDE User Guide</a></li>
+        <li>Getting Started with <a href="http://help.eclipse.org/2018-09/nav/1">Java development</a></li>
         <li>All online <a href="http://help.eclipse.org">Documentation</a></li>
-        <li>What's new and noteworthy in <a href="/photon/noteworthy/">Eclipse Photon</a></li>
+        <li>What's new and noteworthy in <a href="/eclipse/news/4.9/">Eclipse Photon 2018-09</a></li>
         <li><a href="content/eclipse-ide-keybindings.pdf">Eclipse IDE Keybindings</a></li>
       </ul>
     </div>