Fix download link, refresh content/

Change-Id: Iadb5074d030d4fa1b2d4103aa405e9fc91f14cef
Reviewed-on: https://asterix-gerrit.ics.uci.edu/464
Reviewed-by: Till Westmann <tillw@apache.org>
diff --git a/content/download.html b/content/download.html
index 691994f..4281f2a 100644
--- a/content/download.html
+++ b/content/download.html
@@ -94,7 +94,7 @@
 
     <p><a class="btn btn-md btn-info" href="https://github.com/apache/incubator-asterixdb/" role="button">AsterixDB on GitHub <i class="fa fa-github fa-lg"></i></a></p>
     <p><a class="btn btn-md btn-info" href="https://github.com/apache/incubator-asterixdb-hyracks/" role="button">Hyracks on GitHub <i class="fa fa-github fa-lg"></i></a></p>
-    <p><a class="btn btn-md btn-info" href="https://dist.apache.org/repos/dist/release/incubator/asterixdb/" role="button">Source Tarballs <i class="fa fa-download fa-lg"></i></a></p>
+    <p><a class="btn btn-md btn-info" href="https://www.apache.org/dyn/closer.cgi/incubator/asterixdb" role="button">Source Tarballs <i class="fa fa-download fa-lg"></i></a></p>
 
   </div>
 </div>