Update README.md

[Mei-Zhao]

变更背景描述

jira issue链接

主要变更点

• [ ] fix bug
• [ ] new feature
• [ ] 不兼容变更

Checklist

• [ ] 已自测
• [ ] 已更新Readme

[qiniu-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Mei-Zhao

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/qiniu/qshell/blob/master/OWNERS)~~ [Mei-Zhao] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment