Use bookworm as ko release image

[saschagrunert]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Using the latest bookworm image for ko releases.

Which issue(s) this PR fixes:

None

Special notes for your reviewer:

None

Does this PR introduce a user-facing change?

None

[cpanato]

/lgtm

[cpanato]

i still prefer to have the latest then we dont need to update every time, just when we bump

[saschagrunert]

i still prefer to have the latest then we dont need to update every time, just when we bump

The question is why do we promote the images then?

[saschagrunert]

Changed the PRs to just update the distribution rather than the whole registry.

[cpanato]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato, saschagrunert

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[cpanato]

403 API rate limit exceeded

😭

[cpanato]

i still prefer to have the latest then we dont need to update every time, just when we bump

The question is why do we promote the images then?

good question :D
maybe we dont need that, but we need to do a search to see where the promoted image is used, otherwise we can stop the promotion

[cpanato]

/retest