Update README.md (#1843)
Update README.md (#1843)

Changed Ansible 2.3 to 2.4
Atoms/kubespray,insequent/kargo,kubernetes-sigs/kubespray,kubernetes-sigs/kubespray,Abdelsalam-Abbas/kubespray_fork,kubernetes-incubator/kargo,kubespray/kargo,kubernetes-incubator/kubespray,Atoms/kubespray,sgm-media/kargo,Atoms/kubespray,kubernetes-sigs/kubespray,sgm-media/kargo,Atoms/kubespray,kubernetes-sigs/kubespray,kubespray/kargo,kubernetes-incubator/kubespray,kubernetes-incubator/kargo,insequent/kargo,Abdelsalam-Abbas/kubespray_fork