[zh]Update reference pages(part-2) for links with '/zh/' prefix, using new prefix '/zh-cn/'

content/zh-cn/docs/reference/glossary/etcd.md

@@ -2,7 +2,7 @@
 title: etcd
 id: etcd
 date: 2018-04-12
-full_link: /zh/docs/tasks/administer-cluster/configure-upgrade-etcd/
+full_link: /zh-cn/docs/tasks/administer-cluster/configure-upgrade-etcd/
 short_description: >
   etcd 是兼具一致性和高可用性的键值数据库，用作保存 Kubernetes 所有集群数据的后台数据库。
 
@@ -40,7 +40,7 @@ If your Kubernetes cluster uses etcd as its backing store, make sure you have a
 [back up](/docs/tasks/administer-cluster/configure-upgrade-etcd/#backing-up-an-etcd-cluster) plan
 for those data.
 -->	
-你的 Kubernetes 集群的 `etcd` 数据库通常需要有个[备份](/zh/docs/tasks/administer-cluster/configure-upgrade-etcd/#backing-up-an-etcd-cluster)计划。
+你的 Kubernetes 集群的 `etcd` 数据库通常需要有个[备份](/zh-cn/docs/tasks/administer-cluster/configure-upgrade-etcd/#backing-up-an-etcd-cluster)计划。
 <!--
 You can find in-depth information about etcd in the official [documentation](https://etcd.io/docs/).
 -->