It has been announced that CentOS 8 will be End Of Life in Q4, 2021. It will be phased out in favor of the CentOS 8 Stream, which falls between the Fedora and RHEL distributions. Instead of CentOS builds after RHEL updates, the CentOS 8 will be the development track for RHEL. With that in mind, there is a path to "upgrade" or "migrate" from CentOS 8 to CentOS 8 Stream. It is easier than one would think.
dnf install centos-release-stream dnf distro-sync dnf update
Check out the version.
[root@c8-template ~]# cat /etc/redhat-release CentOS Stream release 8
That is it!