release new version v0.16.8 of kueue

[krew-release-bot]

hey krew-index team,

I am krew-release-bot, and I would like to open this PR to publish version v0.16.8 of kueue on behalf of @tenzen-y.

Thanks,
@krew-release-bot

[ahmetb]

🤖 Beep beep! I’m a robot speaking on behalf of @ahmetb. 🤖

---

This pull request does not seem to be a straightforward version bump. I'll have a human review this. If we don't respond within a day, feel free to ping us.

Why wasn't this detected as a plugin version bump:

file plugins/kueue.yaml is not a straightforward version bump: version should move forward ("v0.17.3" vs "v0.16.8")
/kind plugin-update

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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