The manifest that creates the networks.config.openshift.io CRD is using the deprecated apiextensions.k8s.io/v1beta1 API. This causes prometheus alerts to fire for the cluster.
Verify this bug on nightly payload 4.8.0-0.nightly-2021-06-10-224448.
Create manifests and check networking CRD file
# grep apiVersion manifests/cluster-network-01-crd.yml
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (Moderate: OpenShift Container Platform 4.8.2 bug fix and security update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.