Please add blue green deployment example like it was in previous module

[freeseacher]

It's very frustrating that previous examples
https://github.com/GoogleCloudPlatform/terraform-google-managed-instance-group/tree/1.1.15/examples/blue-green
use ultimately not the same syntax

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days

[freeseacher]

not stale

[yuryninog]

Hi @freeseacher

I would like to work in a PR to solve this issue, but it is not clear for me which should the proper syntax. Could you provide an example of a file that has a different syntax please?

Thank you! in advance.