/var/lib/rancher/rke2/server/manifests/rke2-coredns-config.yaml 
apiVersion: <http://helm.cattle.io/v1|helm.cattle.io/v1>
kind: HelmChartConfig
metadata:
  name: rke2-coredns
  namespace: kube-system
spec:
  valuesContent: |-
    nodeSelector:
      app: "coredns"