docs/vsock: fixed typos
docs/vsock: fixed typos

Fixed a couple of typos in `docs/vsock.md`.

Signed-off-by: Dan Horobeanu <de06b8d568359df57e57b444456da06d2313ae63@amazon.com>

firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker