trello.onCommentUpdated matches Trello’s updateComment action on one board.
automations/watch-trello-comment-updates.automation.ts
board as an ID, short link, or URL. Optional static account defaults to the project binding.
Returns a resource event with actionType: "updateComment", actionId, board, occurredAt, the complete provider event, and optional comment, card, memberCreator, and old data when Trello includes them.