Requesting we add a  "[IMPORTANT]" text saying, "Snapshot for VM with vTPM is not supported." 

Would be nice to also mention that "Snapshot for VM with vTPM is only supported from 4.18".

This should get reflected for the following CNV versions "4.14 to 4.17"

This needs to be updated under the following page:

• https://docs.openshift.com/container-platform/4.14/virt/virtual_machines/virt-using-vtpm-devices.html
• https://docs.openshift.com/container-platform/4.15/virt/virtual_machines/virt-using-vtpm-devices.html
• https://docs.openshift.com/container-platform/4.16/virt/virtual_machines/virt-using-vtpm-devices.html
• https://docs.openshift.com/container-platform/4.17/virt/virtual_machines/virt-using-vtpm-devices.html