Fix typo in vringh_test.c

Corrected minor typo in tools/virtio/vringh_test.c:
- Fixed "retreives" to "retrieves"

Signed-off-by: Shivam Chaudhary <cvam0000@gmail.com>
Message-Id: <20241008145204.478749-1-cvam0000@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>