[release-1.16] Pin version of the chainguard kind setup action

[knative-prow-robot]

This is an automated cherry-pick of #15657

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.51%. Comparing base (a230c06) to head (6cf43d4).
Report is 1 commits behind head on release-1.16.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.16   #15693      +/-   ##
================================================
- Coverage         83.55%   83.51%   -0.04%     
================================================
  Files               219      219              
  Lines             17427    17427              
================================================
- Hits              14561    14555       -6     
- Misses             2496     2499       +3     
- Partials            370      373       +3     

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[dsimansk]

/approve
/lgtm

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dsimansk, knative-prow-robot

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[dprotaso]

can you pin net-istio as well?

[skonto]

Sure I will.