:book: Update control-plane contract to mention the label cluster.x-k8s.io/control-plane#12893

k8s-ci-robot merged 1 commit intokubernetes-sigs:mainkubernetes-sigs/cluster-api:mainfrom

chrischdi:pr-contract-cp-labelchrischdi/cluster-api:pr-contract-cp-labelCopy head branch name to clipboard