[zh-cn] sync docs/home

Signed-off-by: xin.li <xin.li@daocloud.io>

content/zh-cn/docs/home/_index.md

@@ -4,7 +4,8 @@ noedit: true
 cid: docsHome
 layout: docsportal_home
 class: gridPage gridPageHome
-linkTitle: "主页"
+# linkTitle: "Documentation"
+linkTitle: "文档"
 main_menu: true
 weight: 10
 hide_feedback: true
@@ -75,31 +76,26 @@ cards:
   description: 浏览术语、命令行语法、API 资源类型和安装工具文档。
   button: 查看参考
   button_path: /zh-cn/docs/reference
-# - name: training
-#   title: "Training"
-#   description: "Get certified in Kubernetes and make your cloud native projects successful!"
-#   button: "View training"
-#   button_path: "/training"
 # - name: contribute
 #   title: Contribute to the Kubernetes
 #   description: Anyone can contribute, whether you’re new to the project or you’ve been around a long time.
 #   button: Find out how to help
 #   button_path: /docs/contribute
-# - name: release-notes
-#   title: K8s Release Notes
-#   description: If you are installing Kubernetes or upgrading to the newest version, refer to the current release notes.
-#   button: "Download Kubernetes"
-#   button_path: "/zh-cn/docs/setup/release/notes"
-- name: training
-  title: "培训"
-  description: "通过 Kubernetes 认证，助你的云原生项目成功！"
-  button: "查看培训"
-  button_path: "/zh-cn/training"
 - name: contribute
   title: 为 Kubernetes 作贡献
   description: 任何人，无论对该项目熟悉与否，都能贡献自己的力量。
   button: 了解如何提供帮助
   button_path: /zh-cn/docs/contribute
+# - name: training
+#   title: "Training"
+#   description: "Get certified in Kubernetes and make your cloud native projects successful!"
+#   button: "View training"
+#   button_path: "/training"
+- name: training
+  title: "培训"
+  description: "通过 Kubernetes 认证，助你的云原生项目成功！"
+  button: "查看培训"
+  button_path: "/zh-cn/training"
 - name: Download
   title: 下载 Kubernetes
   description: 安装 Kubernetes 或将其升级到最新版本。