Add missing "-nanny" in image name.

[willaustin]

The instructions for hot-fixing the recent dnsmasq vulnerability use a different image name than what is in use by the dnsmasq container. When the command in question is run it causes the container to fail on startup. Using the "nanny" image works, though.

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[k8s-ci-robot]

Hi @willaustin. 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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[willaustin]

Comment to see if my CLA agreement is synced.

[chrislovecnm]

Thanks did not get this in this weekend!

[chrislovecnm]

/ok-to-test
/lgtm

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chrislovecnm

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[k8s-github-robot]

Automatic merge from submit-queue.