Typo train

Context

This is an instance of the typo train, a batch of typo fixes and other minor contributions to the Tezos/Octez doc. It is open for anyone's contributions, as long as in Draft mode.

See the meta-issue #2329 for more details.

Closes #3716 (closed).

Closes #2360 (closed).

Manually testing the MR

Check that the commits correspond to the criteria stated above, and 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