add README

-name: 管理员新增和修改：/v1/admin/update
-base_url: ${ENV(base_manager_url)}
-variables:
-    phone: 15005046165
-    password: d033e22ae348aeb5660fc2140aec35850c4da997
-request:
-    headers:
-        Content-Type: application/json;charset=utf-8
-        User-Agent: okhttp/3.12.3
-        Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE1ODc0NTg0MjgsImlhdCI6MTU4NzQzNjgyNywiaXNzIjoibW1tX29wcG1nIiwibmJmIjoxNTg3NDM2ODI3LCJ1aWQiOjMyNDQ3NDc3Mjg1MzMyNDgsImNvbXBhbnlfaWQiOjM2MCwidXNlcl9jb21wYW55X2lkIjozMjQ0NzQ3NzI4NTMzMjQ4fQ.5t4HO5gbAXT_WXHGNf8ZsbXpPHrzsFhnuXWBtPZ4tWs
-    json:
-        account: ${convert_to_string(13559112969)}
-        status: 1
-        id: 6
-        permissionType: [1,2,3]
-    method: POST
-    url: /v1/admin/update