Add missing translations (#305)

Reviewed-on: https://gitea.com/gitea/docs/pulls/305

i18n/zh-cn/docusaurus-plugin-content-docs/current/usage/repository/_category_.json

@@ -1,9 +1,9 @@
 {
-  "label": "Repository",
+  "label": "仓库",
   "position": 10,
   "link": {
     "type": "generated-index",
     "slug": "/usage/repository",
-    "description": "Repository management, Git operations, and content features"
+    "description": "仓库管理，Git操作和内容功能"
   }
 }