[master] fix: bump down kube version in Helm chart

[mergify]

This is an automatic copy of pull request #1442 done by Mergify.

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Kube version has been bump up when we introduced gateway API support, but this prevent some customers to install, especially on openshift

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Cherry-pick of 8da7cec has failed:

On branch mergify/bp/master/pr-1442
Your branch is up to date with 'origin/master'.

You are currently cherry-picking commit 8da7cec.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   helm/gko/README.md

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   helm/gko/Chart.yaml

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[mergify]

Cherry-pick of 8da7cec has failed:

On branch mergify/bp/master/pr-1442
Your branch is up to date with 'origin/master'.

You are currently cherry-picking commit 8da7cec.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   helm/gko/README.md

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   helm/gko/Chart.yaml

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally