test/timeout-overflow: use #X for the timeout number
test/timeout-overflow: use #X for the timeout number

'th doesn't really work for 1/2/3 timeouts, just use # to make it
clear we're dealing with the timeout number.

Signed-off-by: Jens Axboe <cd8c6775e60d6f67a6984377324e5290df3d5358@kernel.dk>

axboe/liburing,axboe/liburing,axboe/liburing