io_uring: fix task leak issue in io_wq_create()

Add missing put_task_struct() in the error path

Cc: stable@vger.kernel.org
Fixes: 0f8baa3c ("io-wq: fully initialize wqe before calling cpuhp_state_add_instance_nocalls()")
Signed-off-by: Penglei Jiang <superman.xpt@gmail.com>
Link: https://lore.kernel.org/r/20250615163906.2367-1-superman.xpt@gmail.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>