add missing links in/zh/docs/home/contribute

Author: howieyuen

content/zh/docs/contribute/_index.md

@@ -6,7 +6,7 @@ main_menu: true
 no_list: true
 weight: 80
 card:
-  name: 贡献
+  name: contribute
   weight: 10
   title: 开始贡献
 ---

content/zh/docs/contribute/localization.md

@@ -3,7 +3,7 @@ title: 本地化 Kubernetes 文档
 content_type: concept
 weight: 50
 card:
-  name: 贡献
+  name: contribute
   weight: 50
   title: 翻译文档
 ---

content/zh/docs/contribute/new-content/new-features.md

@@ -5,7 +5,7 @@ content_type: concept
 main_menu: true
 weight: 20
 card:
-  name: 贡献
+  name: contribute
   weight: 45
   title: 为发行版本撰写功能特性文档 
 ---

content/zh/docs/contribute/new-content/open-a-pr.md

@@ -3,7 +3,7 @@ title: 发起拉取请求（PR）
 content_type: concept
 weight: 10
 card:
-  name: 贡献
+  name: contribute
   weight: 40
 ---
 <!--

content/zh/docs/contribute/style/page-content-types.md

@@ -3,7 +3,7 @@ title: 页面内容类型
 content_type: concept
 weight: 30
 card:
-  name: 贡献
+  name: contribute
   weight: 30
 ---
 <!--

content/zh/docs/contribute/suggesting-improvements.md

@@ -4,7 +4,7 @@ slug: suggest-improvements
 content_type: concept
 weight: 10
 card:
-  name: 贡献
+  name: contribute
   weight: 20
 ---
 <!--