Manual instruction to use "yum" to install security guide on RHEL/CentOS 8 should be "dnf"

[pciranger]

https://static.open-scap.org/openscap-1.3/oscap_user_manual.html states:

To install scap-security-guide on Red Hat Enterprise Linux 8 and newer, on CentOS 8 and newer or on Fedora use the following command:

# yum install scap-security-guide

To install scap-security-guide on Red Hat Enterprise Linux 7 or CentOS 7 or older use the following command:

# yum install scap-security-guide

The second line should be:

# dnf install scap-security-guide

, to keep it consistent with how oscap is to be installed on RHEL 8, CentOS and newer, and on Fedora:

To install OpenSCAP on Red Hat Enterprise Linux 8 and newer, on CentOS 8 and newer or on Fedora use the following command:

# dnf install openscap-scanner