Update RBAC documentation for `endpoints` (#2139)
Update RBAC documentation for `endpoints` (#2139)

For the Role named `nginx-ingress-role`, `endpoints` no longer needs or has `create` and `update` permissions.  This confused me, so I hope this helps!
kubernetes/ingress-nginx,kubernetes/ingress-nginx,caicloud/ingress,canhnt/ingress,kubernetes/ingress-nginx,caicloud/ingress,caicloud/ingress,canhnt/ingress,aledbf/ingress-nginx,caicloud/ingress,aledbf/ingress-nginx,kubernetes/ingress-nginx,canhnt/ingress,aledbf/ingress-nginx,canhnt/ingress,kubernetes/ingress-nginx,aledbf/ingress-nginx