Add download and documentation links for 2.13.13

Change-Id: I9f76cba4c20966d04eca40a4b035f848a9c71737
diff --git a/pages/site/releases/2.13.md b/pages/site/releases/2.13.md
index 40fcc00..d3e3859 100644
--- a/pages/site/releases/2.13.md
+++ b/pages/site/releases/2.13.md
@@ -6,7 +6,8 @@
 toc: true
 ---
 
-Download: **[2.13.12](https://gerrit-releases.storage.googleapis.com/gerrit-2.13.12.war)**
+Download: **[2.13.13](https://gerrit-releases.storage.googleapis.com/gerrit-2.13.13.war)**
+| [2.13.12](https://gerrit-releases.storage.googleapis.com/gerrit-2.13.12.war)
 | [2.13.11](https://gerrit-releases.storage.googleapis.com/gerrit-2.13.11.war)
 | [2.13.10](https://gerrit-releases.storage.googleapis.com/gerrit-2.13.10.war)
 | [2.13.9](https://gerrit-releases.storage.googleapis.com/gerrit-2.13.9.war)
@@ -20,7 +21,8 @@
 | [2.13.1](https://gerrit-releases.storage.googleapis.com/gerrit-2.13.1.war)
 | [2.13](https://gerrit-releases.storage.googleapis.com/gerrit-2.13.war)
 
-Documentation: **[2.13.12](https://gerrit-documentation.storage.googleapis.com/Documentation/2.13.12/index.html)**
+Documentation: **[2.13.13](https://gerrit-documentation.storage.googleapis.com/Documentation/2.13.13/index.html)**
+| [2.13.12](https://gerrit-documentation.storage.googleapis.com/Documentation/2.13.12/index.html)
 | [2.13.11](https://gerrit-documentation.storage.googleapis.com/Documentation/2.13.11/index.html)
 | [2.13.10](https://gerrit-documentation.storage.googleapis.com/Documentation/2.13.10/index.html)
 | [2.13.9](https://gerrit-documentation.storage.googleapis.com/Documentation/2.13.9/index.html)