update version

Signed-off-by: oilbeater <[email protected]>

Author: oilbeater

mkdocs.yml

@@ -261,8 +261,8 @@ extra:
     - icon: fontawesome/brands/docker
       link: https://hub.docker.com/r/kubeovn/kube-ovn
   variables:
-    version: v1.12.12
-    branch: release-1.12
+    version: v1.13.0
+    branch: release-1.13
 copyright: 
    <p>The Linux Foundation has registered trademarks and uses trademarks. For a list of trademarks of The Linux Foundation, 
          please see our <a href="https://www.linuxfoundation.org/legal/trademark-usage">Trademark Usage page</a>.