Description of problem:
In 4.20, the number of available PCI slots for hot-plugging interfaces increased from 4 to 6.
The docs are still stating that only 4 are available:
https://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html/virtualization/networking#virtio-limitations_virt-hot-plugging-network-interfaces

OpenShift Virtualization reserves up to four slots for hot plugging interfaces.

Version-Release number of selected component (if applicable):
CNV 4.20/4.21