trello.updateCustomField changes a Custom Field’s name, position, or card-front display setting. Its value type can’t be changed.
automations/update-trello-custom-field.automation.ts
customFieldId and at least one of displayOnCardFront, non-empty name, or position. position accepts "top", "bottom", or a nonnegative number. Optional second argument { account } selects a Trello binding.
Returns the updated TrelloCustomField.