docker: fix the --security-opt syntax
It seems like --security-opt label:disable
is accepted by Docker, but
is not the recommended way [1]. The current way is however is not
supported by Podman, so let's use the documented way which makes running
vk-cts-image work on both podman and docker!
[1] https://docs.docker.com/engine/reference/run/#security-configuration
Signed-off-by: Martin Roukala (né Peres) martin.roukala@mupuf.org