Fix the link to the LICENSE file in CONTRIBUTE.md
Fix the link to the LICENSE file in CONTRIBUTE.md

Signed-off-by: Alex Chan <b16ede0fcf15da530a3f6afcea500dfd87f41d02@wellcome.ac.uk>

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