docs: update docs to correct path from change_password to change-password

Author: 孔令飞

docs/guide/zh-CN/api/user.md

@@ -164,10 +164,10 @@ Null
 **输入示例**
 
 ```bash
-curl -XPOST -H'Content-Type: application/json' -d'{
+curl -XPOST -H'Content-Type: application/json' -H'Authorization: Basic $(echo -n 'foo:Foo@2020'|base64)' -d'{
   "oldPassword": "Foo@2020",
   "newPassword": "Foo@2021"
-}' http://marmotedu.io:8080/v1/users/foo/change_password
+}' http://marmotedu.io:8080/v1/users/foo/change-password
 ```
 
 **输出示例**