doc: typo train

Context

This is the current edition of the typo train, an MR grouping minor changes to the documentation. Your contributions are welcome as long as in Draft mode.

See meta-issue #2329 for more details.

Closes #3425 (closed).

Manually testing the MR

Check that the changes conform to the description above, and that they improve the doc.

Checklist

• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR