Change static manifest pod files permissions to 0600 to conform with CIS benchmarks

Refer to the CIS RedHat OpenShift Container Platform Benchmark PDF: https://drive.google.com/file/d/12o6O-M2lqz__BgmtBrfeJu1GA2SJ352c/view
1.1.7 Ensure that the etcd pod specification file permissions are set to 600 or more restrictive (Manual)
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As per CIS v1.3 PDF permissions should be 600 with the following statement:
"The pod specification file is created on control plane nodes at /etc/kubernetes/manifests/etcd-member.yaml with permissions 644. Verify that the permissions are 600 or more restrictive."
But when I ran the following command it was showing 644 permissions

for i in $(oc get pods -n openshift-etcd -l app=etcd -o name | grep etcd )
do
echo "check pod $i"
oc rsh -n openshift-etcd $i \
stat -c %a /etc/kubernetes/manifests/etcd-pod.yaml
done