Addedd kubernetesui/dashboard v2.2.0 to copy-images.yaml

[robinschneider]

/kind enhancement

What this PR does / why we need it:
Add missing kubernetesui/dashboard v2.2.0 to copy-images.yaml
Part of #619

[gardener-prow]

Hi @robinschneider. Thanks for your PR.

I'm waiting for a gardener 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.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[timebertt]

/lgtm
/ok-to-test

[gardener-prow]

LGTM label has been added.

Git tree hash: ab4d77296c72295cc587cd427e0dd785c23d5431

[gardener-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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