workqueue: Fix comment for unbound workqueue's attrbutes

Signed-off-by: NWang Long <wanglong19@meituan.com>
Signed-off-by: NTejun Heo <tj@kernel.org>

kernel/workqueue.c

@@ -5013,9 +5013,10 @@ int workqueue_set_unbound_cpumask(cpumask_var_t cpumask)
  *
  * Unbound workqueues have the following extra attributes.
  *
- *  id		RO int	: the associated pool ID
+ *  pool_ids	RO int	: the associated pool IDs for each node
  *  nice	RW int	: nice value of the workers
  *  cpumask	RW mask	: bitmask of allowed CPUs for the workers
+ *  numa	RW bool	: whether enable NUMA affinity
  */
 struct wq_device {
 	struct workqueue_struct		*wq;