Fix metallb example yaml

[caruccio]

Added missing :

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/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:

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Does this PR introduce a user-facing change?:

Fix metallb example yaml

[k8s-ci-robot]

Hi @caruccio. Thanks for your PR.

I'm waiting for a kubernetes-sigs 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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[yankay]

Thanks @caruccio for the PR
Thanks @noriban for the review.

/lgtm

[yankay]

/ok-to-test

[floryut]

@caruccio Thank you

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: caruccio, floryut

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