Small text edits

[twilamoon-science]

Description

Small edits to the metadata tutorial text.

Checklist

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

• [ ] Config lockfile updated (inv config.export > qgreenland/config/cfg-lock.json)
• [ ] Version bumped if needed (bumpversion (major|minor|patch|prerelease|build)
• [ ] CHANGELOG.md updated
• [ ] Documentation updated if needed
• [ ] New unit tests if needed

[twilamoon-science]

We could consider adding a third method - viewing the layer .csv file in the QGreenland Core package.