doc: version to 2.9.3

[YangSen-qn]

变更背景描述

jira issue链接

https://jira.qiniu.io/browse/KODO-16893 https://jira.qiniu.io/browse/KS-42 https://jira.qiniu.io/browse/KODO-16944

主要变更点

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

Checklist

• [x] 已自测
• [x] 已更新Readme

[qiniu-bot]

Hi @YangSen-qn. Thanks for your PR.

I'm waiting for a qiniu member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[codecov[bot]]

Codecov Report

Merging #370 (b692c78) into master (92050dc) will not change coverage. The diff coverage is n/a.

:exclamation: Current head b692c78 differs from pull request most recent head 7ee717f. Consider uploading reports for the commit 7ee717f to get more accurate results

Additional details and impacted files

[](https://codecov.io/gh/qiniu/qshell/pull/370?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiniu) ```diff @@ Coverage Diff @@ ## master #370 +/- ## ======================================= Coverage 12.18% 12.18% ======================================= Files 24 24 Lines 1116 1116 ======================================= Hits 136 136 Misses 957 957 Partials 23 23 ```

[qiniu-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bachue, YangSen-qn

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

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