docs: update ContributorVo (halo-dev/halo#4705) (#263)

/kind documentation

link: https://github.com/halo-dev/halo/pull/4705


```release-note
更新 ContributorVo 格式
```

docs/developer-guide/theme/vo/ContributorVo.md

@@ -4,6 +4,16 @@
   "displayName": "string",                            // 显示名称
   "avatar": "string",                                 // 头像
   "bio": "string",                                    // 描述
-  "permalink": "string"                               // 作者的文章归档页面链接
+  "permalink": "string",                              // 作者的文章归档页面链接
+  "metadata": {
+    "name": "string",                                 // 唯一标识
+    "labels": {
+      "additionalProp1": "string"
+    },
+    "annotations": {
+      "additionalProp1": "string"
+    },
+    "creationTimestamp": "2022-11-20T13:06:38.512Z",  // 创建时间
+  }
 }
 ```