Addon headlamp: Update headlamp-k8s/headlamp image from v0.26.0 to v0.28.0

[joaquimrocha]

Upgrade Headlamp version to 0.28.0
cc: @joaquimrocha

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @joaquimrocha. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[minikube-bot]

Can one of the admins verify this patch?

[medyagh]

@joaquimrocha would you be ineterested to add this as an auto-updater simmilar to other addons to be making this PR automatically in github action ? checkout our github action for other addons

[medyagh]

#20100 (comment)

[joaquimrocha]

#20100 (comment)

Just replied to your comment. Sorry again for the delay.
I think that we can move on faster with the automation, but it's maybe worth merging this one now, since I realized that the 0.27.0 has not been merged. WDYT?