[release-1.15] Pin version of the chainguard kind setup action

[knative-prow-robot]

This is an automated cherry-pick of #15657

[dprotaso]

/lgtm
/approve

[knative-prow]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.58%. Comparing base (cd671a9) to head (188727c).
Report is 1 commits behind head on release-1.15.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.15   #15714      +/-   ##
================================================
- Coverage         83.63%   83.58%   -0.05%     
================================================
  Files               219      219              
  Lines             17410    17410              
================================================
- Hits              14560    14552       -8     
- Misses             2484     2490       +6     
- Partials            366      368       +2     

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[evankanderson]

/retest

[dprotaso]

ImagePullBackOff on

gcr.io/knative-nightly/knative.dev/net-gateway-api/cmd/controller@sha256:a5b77e572574865139614982c9eede9fac6f02422b796c1207856597d48bc8ac

[dprotaso]

Image isn't found - I'm wondering if it was deleted

[dprotaso]

Looks like all the nightlies are gone for some reason.

I've pinned the dependencies to a proper v1.15.x point release to unblock these cherry picks

[dprotaso]

/lgtm

[dprotaso]

/lgtm

forgot the net-gateway-api controllers