update kubespray image tag in readme to v2.19.0 (#8934)
update kubespray image tag in readme to v2.19.0 (#8934)

Signed-off-by: bo.jiang <3d2eb430d7edbf0ec07b670ed378db7970ecadca@daocloud.io>
kubernetes-sigs/kubespray,kubernetes-sigs/kubespray,kubernetes-sigs/kubespray,Atoms/kubespray,Atoms/kubespray,Atoms/kubespray,Atoms/kubespray,kubernetes-sigs/kubespray