--osname and --remote descriptions are identical and need to be a little more descriptive of their purpose and expected arguments.

Reported by: jcope

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/performing_an_advanced_rhel_9_installation/kickstart-commands-and-options-reference_installing-rhel-as-an-experienced-user#annotations:57147430-0381-42e6-bb22-d378600591f3