man/io_uring_enter.2: document IORING_OP_SEND_ZC
man/io_uring_enter.2: document IORING_OP_SEND_ZC

Signed-off-by: Pavel Begunkov <8608d41fe50396a9dbd36e830be65ba791e26c05@gmail.com>
Link: https://lore.kernel.org/r/e876fa3c0de9d45db41a796eb8ac547e298a8787.1662459139.git.8608d41fe50396a9dbd36e830be65ba791e26c05@gmail.com
Signed-off-by: Jens Axboe <cd8c6775e60d6f67a6984377324e5290df3d5358@kernel.dk>

axboe/liburing,axboe/liburing,axboe/liburing