Restricted notes: Clarify that admin can also mark notes restricted #2371
Who is this PR for?
What problem does this PR fix?
What does this PR do?
Just adds copy clarifying. Before a general release later, it'd be better to make explicit who marked the note as restricted (so folks know who to follow up with), but this is a good first step for now.
Which features or pages does this PR touch?
Does this PR use tests to help verify we can deploy these changes quickly and confidently?