[Feature Request]: Validate if the generated actions is out of date

[tusharmath]

Expected Behavior

The generated workflow should automatically detect if it has been modified and fail CI if it happens.

Actual Behavior

CI should fail if the generated workflow is out of sync.

Additional Information This is a fantastic tool @emmanuelnk! I have been looking for something like this ever since I moved from https://github.com/sbt/sbt-github-actions

One very useful feature I miss from SBT Github Actions is the githubWorkflowCheck setting. When enabled it would automatically check if the generated workflow is out of date and fail the CI if it did.

Let me know your thoughts of supporting this feature. Thanks once again for building this amazing tool!