Update RHEL 8 STIG profile

[carlosmmatos]

Remove [DRAFT] wording and ensure the profile is in line with the latest official DISA STIG release for RHEL 8.

[carlosmmatos]

@all-contributors please add @carlosmmatos for code

[allcontributors]

@carlosmmatos

I've put up a pull request to add @carlosmmatos! 🎉