Fix lint issue QF1001

[seanlaii]

What type of PR is this?
/kind cleanup

What this PR does / why we need it:
Fix lint issue - QF1001: could apply De Morgan's law (staticcheck).
For more details: https://staticcheck.dev/docs/checks#QF1001

Which issue(s) this PR fixes:
Part of #6273

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 48.06%. Comparing base (1d25159) to head (d4614ed).

Files with missing lines	Patch %	Lines
pkg/karmadactl/get/get.go	0.00%	1 Missing ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6297      +/-   ##
==========================================
- Coverage   48.06%   48.06%   -0.01%     
==========================================
  Files         678      678              
  Lines       56117    56117              
==========================================
- Hits        26973    26972       -1     
+ Misses      27373    27372       -1     
- Partials     1771     1773       +2     

Flag	Coverage Δ
unittests	48.06% <0.00%> (-0.01%)	⬇️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[XiShanYongYe-Chang]

/lgtm
/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: XiShanYongYe-Chang

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 [XiShanYongYe-Chang]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment