Update links for 2.15.6

Change-Id: I605aa3d6050e3e519f98efa9e1f5798ae81ae747
diff --git a/index.md b/index.md
index 5ce2a46..62ac134 100644
--- a/index.md
+++ b/index.md
@@ -66,9 +66,9 @@
                 <div class="panel-body">
                     <h4>Download</h4>
                     <p>Our latest release is:<br>
-                    <b><a href="2.15.html">2.15.5</a></b>
+                    <b><a href="2.15.html">2.15.6</a></b>
                     </p>
-                    <a href="https://gerrit-releases.storage.googleapis.com/gerrit-2.15.5.war" class="btn btn-primary">Download</a>
+                    <a href="https://gerrit-releases.storage.googleapis.com/gerrit-2.15.6.war" class="btn btn-primary">Download</a>
                 </div>
             </div>
         </div>
@@ -111,16 +111,16 @@
 </tr>
 </table>
 
-Schedule [git gc](https://gerrit-documentation.storage.googleapis.com/Documentation/2.15.5/config-gerrit.html#gc)
+Schedule [git gc](https://gerrit-documentation.storage.googleapis.com/Documentation/2.15.6/config-gerrit.html#gc)
 over all managed repositories and
-[replicate](https://gerrit.googlesource.com/plugins/replication/+doc/v2.15.5/src/main/resources/Documentation/config.md)
+[replicate](https://gerrit.googlesource.com/plugins/replication/+doc/v2.15.6/src/main/resources/Documentation/config.md)
 to geographical mirrors for latency reduction and backup servers for hot
 spare redundancy.
 
 ## Extensible through plugins
 
 Gerrit Code Review can be extended and further customized by installing
-[server-side plugins](https://gerrit-documentation.storage.googleapis.com/Documentation/2.15.5/config-plugins.html).
+[server-side plugins](https://gerrit-documentation.storage.googleapis.com/Documentation/2.15.6/config-plugins.html).
 Source code for additional plugins can be found through the
 [project listing](https://gerrit.googlesource.com/plugins/).
 
diff --git a/pages/site/releases/2.15.md b/pages/site/releases/2.15.md
index a1b13c3..bfbcd02 100644
--- a/pages/site/releases/2.15.md
+++ b/pages/site/releases/2.15.md
@@ -6,14 +6,16 @@
 toc: true
 ---
 
-Download: **[2.15.5](https://gerrit-releases.storage.googleapis.com/gerrit-2.15.5.war)**
+Download: **[2.15.6](https://gerrit-releases.storage.googleapis.com/gerrit-2.15.6.war)**
+| [2.15.5](https://gerrit-releases.storage.googleapis.com/gerrit-2.15.5.war)
 | [2.15.4](https://gerrit-releases.storage.googleapis.com/gerrit-2.15.4.war)
 | [2.15.3](https://gerrit-releases.storage.googleapis.com/gerrit-2.15.3.war)
 | [2.15.2](https://gerrit-releases.storage.googleapis.com/gerrit-2.15.2.war)
 | [2.15.1](https://gerrit-releases.storage.googleapis.com/gerrit-2.15.1.war)
 | [2.15](https://gerrit-releases.storage.googleapis.com/gerrit-2.15.war)
 
-Documentation: **[2.15.5](https://gerrit-documentation.storage.googleapis.com/Documentation/2.15.5/index.html)**
+Documentation: **[2.15.6](https://gerrit-documentation.storage.googleapis.com/Documentation/2.15.6/index.html)**
+| [2.15.5](https://gerrit-documentation.storage.googleapis.com/Documentation/2.15.5/index.html)
 | [2.15.4](https://gerrit-documentation.storage.googleapis.com/Documentation/2.15.4/index.html)
 | [2.15.3](https://gerrit-documentation.storage.googleapis.com/Documentation/2.15.3/index.html)
 | [2.15.2](https://gerrit-documentation.storage.googleapis.com/Documentation/2.15.2/index.html)