docker-compose.yml should not contain version

[B-z-F]

Describe the problem

docker-compose.yml created from getting-started-with-zitadel.sh via function renderDockerCompose() should not contain version - it causes warning from docker compose:

WARN[0000] docker-compose.yml: the attribute `version` is obsolete, it will be ignored, please remove it to avoid potential confusion 

[Silex]

I addressed this in #3981