fix: go mod tidy

[rambohe-ch]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line: /kind bug /kind documentation /kind enhancement /kind good-first-issue /kind feature /kind question /kind design /sig ai /sig iot /sig network /sig storage /sig storage /kind enhancement

What this PR does / why we need it:

fix small miss of go mod tidy

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

[openyurt-bot]

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In response to [this](https://github.com/openyurtio/yurt-app-manager/pull/95): > > > >#### What type of PR is this? >> Uncomment only one ` /kind <>` line, hit enter to put that in a new line, and remove leading whitespace from that line: >> /kind bug >> /kind documentation >> /kind enhancement >> /kind good-first-issue >> /kind feature >> /kind question >> /kind design >> /sig ai >> /sig iot >> /sig network >> /sig storage >> /sig storage >/kind enhancement > > >#### What this PR does / why we need it: >fix small miss of `go mod tidy` > >#### Which issue(s) this PR fixes: > >Fixes # > >#### Special notes for your reviewer: > > > >#### Does this PR introduce a user-facing change? > >```release-note > >``` > >#### other Note > > 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 #95 (f944d69) into master (ffb2bc9) will increase coverage by 0.11%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #95      +/-   ##
==========================================
+ Coverage   21.21%   21.33%   +0.11%     
==========================================
  Files          21       21              
  Lines        2550     2550              
==========================================
+ Hits          541      544       +3     
+ Misses       1932     1930       -2     
+ Partials       77       76       -1     

Flag	Coverage Δ
unittests	21.33% <ø> (+0.11%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...manager/controller/nodepool/nodepool_controller.go	56.41% <0.00%> (+1.01%)	:arrow_up:

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[huiwq1990]

/lgtm /approve

[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: huiwq1990, rambohe-ch

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