Trey tutorial docs updates

[trey-stafford]

Description

Update tutorial docs for accuracy.

Checklist

If an item on this list is done or not needed, check it with [x] or click the
checkbox.

• The PR description links to issues that it resolves with closes #{issue_number}
• Config lockfile updated (inv config.export > qgreenland/config/cfg-lock.json)
• Environment lockfile updated if needed (conda-lock)
• Version bumped if needed (bumpversion (major|minor|patch|prerelease|build))
• CHANGELOG.md updated (for user-facing changes)
• Documentation updated if needed
• New unit tests if needed

[MattF-NSIDC]

Looks great! I have some suggestions, but don't think they require a re-check afterwards. If you disagree just re-request my review :)