[release-0.12] 🌱 data: use latest Flatcar stable from image-builder#2420

k8s-ci-robot merged 1 commit intokubernetes-sigs:release-0.12kubernetes-sigs/cluster-api-provider-openstack:release-0.12from

k8s-infra-cherrypick-robot:cherry-pick-2419-to-release-0.12k8s-infra-cherrypick-robot/cluster-api-provider-openstack:cherry-pick-2419-to-release-0.12Copy head branch name to clipboard