x509 error is prompted when using the openshift-image-registry default route to create a pod

Issue

• x509 error is prompted when using the openshift-image-registry default route to create a pod.

$ oc get ev
28s         Warning   Failed              pod/my-deployment-b7f5d4c86-t7pv2    Failed to pull image "default-route-openshift-image-registry.apps.ocp4.example.com/hello-world/hello-world-nginx:v1.0": rpc error: code = Unknown desc = pinging container registry default-route-openshift-image-registry.apps.ocp4.example.com: Get "https://default-route-openshift-image-registry.apps.ocp4.example.com/v2/": x509: certificate signed by unknown authority