Add OpenSCAP guide for AlmaLinux OS 10

The wiki has OpenSCAP guides for AlmaLinux OS 8 and 9 but not 10:

OS 9: https://wiki.almalinux.org/documentation/openscap-guide-for-9.html
OS 8: https://wiki.almalinux.org/documentation/openscap-guide.html
OS 10: openscap-guide-for-10.html → 404 (does not exist)
We should publish an OpenSCAP guide for AlmaLinux OS 10 at openscap-guide-for-10.html, following the structure of the OS 9 guide.

Context: the redesigned security page on almalinux.org links a per-version OpenSCAP guide in its "Compliance and hardening" panel (thanks to @elwoodos for noticing!)