When upgrading cilium from 1.8.8 to 1.9.5 I ran into the following
error:

level=error msg="Unable to update CRD" error="customresourcedefinitions.apiextensions.k8s.io
\"ciliumnodes.cilium.io\" is forbidden: User \"system:serviceaccount:kube-system:cilium-operator\"
cannot update resource \"customresourcedefinitions\" in API group \"apiextensions.k8s.io\" at the
cluster scope" name=CiliumNode/v2 subsys=k8s

The fix was to add the update verb to the clusterrole. I also added
create to match the clusterrole created by the cilium helm chart.