|Clarified to indicate RHEL 8 is fine; only CentOS 8 is discouraged.
When changes were made to indicate CentOS 8 was discouraged (due to
being made upstream of RHEL, and thus a dev/test sandbox for RHEL
(like Fedora) rather than a solid downstream distro suitable for
production, use, the text inadvertaintly gavem the impression that
RHEL 8 was not supported.