var.additional_security_group_ids not in use by the module

[danielmapar]

Just a heads up that var.additional_security_group_ids is not being used by the aws_network_interface resource.

A visible fix is to point security_groups = [aws_security_group.main.id] to security_groups = local.security_groups

Great work with the module!

[danielmapar]

A quick PR: #28

[kieranbrown]

Hey @danielmapar, I thought the same thing too and also raised a PR for this, but this is the intended behaviour - see the following comment #9 (comment)