deps: update dependency googlecontainertools/skaffold to v2.21.0#1243

lukasmetzner merged 2 commits into

mainhetznercloud/hcloud-cloud-controller-manager:mainfrom

renovate/googlecontainertools-skaffold-2.xhetznercloud/hcloud-cloud-controller-manager:renovate/googlecontainertools-skaffold-2.xCopy head branch name to clipboard