[fix] generateDockerCompose re-runs if template tokens change

[a10y]

Fixes #226

Allows regenerating files when the template tokens change.

Still needs test

Before this PR

After this PR

[a10y]

There's no unit test suite for the GenerateDockerComposeTask, but I tested locally via publishToMavenLocal that

1. Make a docker-compose.template.yml file with a templateToken based on the git version
2. Make a commit
3. ./gradlew generateDockerCompose outputs docker-compose.yml with git version
4. Make another commit
5. ./gradlew generateDockerCompose rewrites docker-compose.yml with new git version