chore: upgrade setup-ko to its latest version

[developer-guy]

Signed-off-by: Batuhan Apaydın [email protected]

Changes

I upgraded the setup-ko GitHub Action to the latest version because ko has been moving its organization recently.

https://github.com/imjasonh/setup-ko#github-action-to-install-and-setup-ko

Submitter Checklist

As the author of this PR, please check off the items in this checklist:

• Has Docs included if any changes are user facing
• Has Tests included if any functionality added or changed
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  functionality, content, code)
• Release notes block below has been updated with any user facing changes (API changes, bug fixes, changes requiring upgrade notices or deprecation warnings)
• [] Release notes contains the string "action required" if the change requires additional action from users switching to the new release

Release Notes

e2e tests are now using the latest of the version of _setup-ko_ GitHub action because ko has been moving its organization recently.

/cc @imjasonh

[tekton-robot]

Hi @developer-guy. Thanks for your PR.

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[wlynch]

/ok-to-test

[wlynch]

Integration test failure is likely not from this change, we've been seeing it in a few other PRs starting yesterday. Filed #577 to track.

[wlynch]

/lgtm
/approve

[tekton-robot]

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[wlynch]

@developer-guy - you may need to rebase to pick up the integration test fixes.

[lcarva]

/lgtm