io_uring: minor clean up in trace events definition

Fix tabulation to make nice columns
Reviewed-by: NPavel Begunkov <asml.silence@gmail.com>
Signed-off-by: NOlivier Langlois <olivier@trillion01.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

include/trace/events/io_uring.h

@@ -318,7 +318,6 @@ TRACE_EVENT(io_uring_complete,
 			  __entry->res, __entry->cflags)
 );
 
-
 /**
  * io_uring_submit_sqe - called before submitting one SQE
  *