Consider switching to main Rocky dnf servers to avoid intermittent failures

For those workflows where additional software is required to be installed via `dnf`, the default `mirrorlist=` option in `/opt/yum.repos.d/*.repo` can sometimes fail due to mirror server availability / RPM propagation delay. Consider switching to `baseurl=` to connect to the main Rocky Linux distribution servers.

Inspect the `/opt/yum.repos.d/*.repo` configuration used by the affected workflows and compare the current `mirrorlist=` entries with Rocky Linux's main distribution servers. Replace the repository configuration as appropriate, then verify that workflows requiring additional `dnf` software install successfully without intermittent mirror or RPM propagation failures.

Written by the indexing model from the issue text.