[EDITORIAL] Replace placeholder text in Comments on level AAA editor's note

[pday1]

As per the discussion in the task force meeting of 2nd April, replace the current placeholder text in the second editor's note with a proposal that matches what was discussed.

This should then be reviewed by bbailey, Daniel, GreggVan, Laura, PhilDay, Loïc Martínez Normand.

Once the text is approved then create a PR to make this change.