Updates a desk's name and the set of users assigned to it.

Parameters. id (path): the desk to update. name: a new name for the desk. userIds: the full set of user IDs that should be assigned to the desk. Any user not in this list is removed from the desk.
Returns. { "userDesk": { ... } } with the updated desk.
Example. PUT /api/desks/5 with { "name": "Desk-English", "userIds": [2] }