update helm to v2.7.0 (#1875)
update helm to v2.7.0 (#1875)

* update helm to v2.7.0

* Update main.yml

kubernetes-incubator/kargo,Atoms/kubespray,sgm-media/kargo,kubernetes-sigs/kubespray,Atoms/kubespray,sgm-media/kargo,kubernetes-incubator/kubespray,Atoms/kubespray,kubernetes-sigs/kubespray,kubernetes-incubator/kargo,Abdelsalam-Abbas/kubespray_fork,kubernetes-incubator/kubespray,Atoms/kubespray,insequent/kargo,kubespray/kargo,kubernetes-sigs/kubespray,kubespray/kargo,insequent/kargo,kubernetes-sigs/kubespray,Abdelsalam-Abbas/kubespray_fork