fix typo

[kaaaaaaang]

What problem does this PR solve?

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release notes:

NONE

[ti-chi-bot[bot]]

@KanShiori: adding LGTM is restricted to approvers and reviewers in OWNERS files.

In response to [this](https://github.com/pingcap/tiup/pull/2312#pullrequestreview-1729015076): > 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-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (2b79923) 55.42% compared to head (e36eb0b) 54.65%.

:exclamation: Current head e36eb0b differs from pull request most recent head b21be81. Consider uploading reports for the commit b21be81 to get more accurate results

Files	Patch %	Lines
pkg/cluster/manager/display.go	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2312 +/- ## ========================================== - Coverage 55.42% 54.65% -0.77% ========================================== Files 325 325 Lines 34725 34725 ========================================== - Hits 19244 18977 -267 - Misses 13184 13490 +306 + Partials 2297 2258 -39 ``` | [Flag](https://app.codecov.io/gh/pingcap/tiup/pull/2312/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | Coverage Δ | | |---|---|---| | [cluster](https://app.codecov.io/gh/pingcap/tiup/pull/2312/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `43.37% <0.00%> (-1.38%)` | :arrow_down: | | [dm](https://app.codecov.io/gh/pingcap/tiup/pull/2312/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `25.46% <0.00%> (ø)` | | | [playground](https://app.codecov.io/gh/pingcap/tiup/pull/2312/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `15.25% <ø> (+0.02%)` | :arrow_up: | | [tiup](https://app.codecov.io/gh/pingcap/tiup/pull/2312/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `33.48% <ø> (ø)` | | | [unittest](https://app.codecov.io/gh/pingcap/tiup/pull/2312/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `22.38% <0.00%> (+0.01%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap#carryforward-flags-in-the-pull-request-comment) to find out more.

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[kaaaaaaang]

/approve

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kaaaaaaang

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