Update quay.io/brancz/kube-rbac-proxy Docker tag to v0.21.2#16

vshn-renovate wants to merge 1 commit intomasterappuio/component-machine-api-provider-cloudscale:masterfrom

commodore-renovate/quay.io-brancz-kube-rbac-proxy-0.xappuio/component-machine-api-provider-cloudscale:commodore-renovate/quay.io-brancz-kube-rbac-proxy-0.xCopy head branch name to clipboard