examples/io_uring_cp: fix bug while re-queuing
examples/io_uring_cp: fix bug while re-queuing

Add io_uring_submit after queue_prepped while re-queuing sqe.

Signed-off-by: monte <eb7b8f35e9b9d6dd4112b926eb36781eb306ca7d@gmail.com>

axboe/liburing,axboe/liburing,axboe/liburing