Rename OWNERS assignees: to approvers: (#6121)

They are effectively the same, assignees is deprecated

cn/docs/concepts/architecture/nodes.md

@@ -1,5 +1,5 @@
 ---
-assignees:
+approvers:
 - caesarxuchao
 - dchen1107
 

cn/docs/concepts/overview/components.md

@@ -1,5 +1,5 @@
 ---
-assignees:
+approvers:
 - lavalamp
 title: Kubernetes 组件
 redirect_from:

cn/docs/concepts/policy/pod-security-policy.md

@@ -1,5 +1,5 @@
 ---
-assignees:
+approvers:
 - pweil-
 title: Pod 安全策略
 redirect_from:

cn/docs/concepts/services-networking/add-entries-to-pod-etc-hosts-with-host-aliases.md

@@ -1,5 +1,5 @@
 ---
-assignees:
+approvers:
 - rickypai
 - thockin
 title: 使用 HostAliases 向 Pod /etc/hosts 文件添加条目

cn/docs/concepts/services-networking/dns-pod-service.md

@@ -1,5 +1,5 @@
 ---
-assignees:
+approvers:
 - davidopp
 - thockin
 title: DNS Pod 与 Service

cn/docs/concepts/services-networking/service.md

@@ -1,5 +1,5 @@
 ---
-assignees:
+approvers:
 - bprashanth
 title: Service
 redirect_from:

cn/docs/concepts/workloads/controllers/cron-jobs.md

@@ -1,5 +1,5 @@
 ---
-assignees:
+approvers:
 - erictune
 - soltysh
 - janetkuo

cn/docs/concepts/workloads/controllers/daemonset.md

@@ -1,5 +1,5 @@
 ---
-assignees:
+approvers:
 - erictune
 title: DaemonSet
 redirect_from:

cn/docs/concepts/workloads/pods/init-containers.md

@@ -1,5 +1,5 @@
 ---
-assignees:
+approvers:
 - erictune
 title: Init 容器
 redirect_from: