add a 3rd tile,sync form en version

Signed-off-by: liulijin <253954033@qq.com>

Update content/zh-cn/docs/reference/access-authn-authz/service-accounts-admin.md

Co-authored-by: Michael <haifeng.yao@daocloud.io>

content/zh-cn/docs/reference/access-authn-authz/service-accounts-admin.md

@@ -244,11 +244,15 @@ to obtain short-lived API access tokens is recommended instead.
 <!--
 ## Control plane details
 
+### ServiceAccount controller
+
 A ServiceAccount controller manages the ServiceAccounts inside namespaces, and
 ensures a ServiceAccount named "default" exists in every active namespace.
 -->
 ## 控制平面细节   {#control-plane-details}
 
+### ServiceAccount 控制器   {#serviceaccount-controller} 
+
 ServiceAccount 控制器管理名字空间内的 ServiceAccount，
 并确保每个活跃的名字空间中都存在名为 `default` 的 ServiceAccount。