Merge pull request #69813 from phlogistonjohn/jjm-smb-rgw-doc-fixes

doc: fix some small errors and oversights for new rgw shares

Reviewed-by: Anoop C S <anoopcs@cryptolab.net>
Reviewed-by: Anthony D Atri <anthony.datri@gmail.com>
Reviewed-by: Avan Thakkar <athakkar@redhat.com>