Clarify definition of --pull options

[rhatdan]

Fixes: https://github.com/containers/buildah/issues/5406

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/kind api-change /kind bug /kind cleanup /kind deprecation /kind design /kind documentation /kind failing-test /kind feature /kind flake /kind other

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[TomSweeneyRedHat]

rebase needed. I think similar changes are needed to buildah-commit.1.md

[packit-as-a-service[bot]]

Ephemeral COPR build failed. @containers/packit-build please check.

[rhatdan]

@TomSweeneyRedHat since buildah commit is pulling SBOM Scanner image, I will leave this to @nalind to decide, lets get this merged so that standard images work in the same was as podman.

[TomSweeneyRedHat]

@rhatdan all kinds or red test unhappiness here.