Updating security group attachment location due to deprecation

[bengaywins]

what

• This addresses the deprecation notice currently being output as a result of using this module.

why

• The argument is deprecated on the aws_ec2_client_vpn_network_association resource and will be removed in the near future.

references

• https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/ec2_client_vpn_network_association
• https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/ec2_client_vpn_endpoint

[joe-niland]

/test all

[joe-niland]

/test all

[joe-niland]

@bengaywins thanks for your contribution! Released as https://github.com/cloudposse/terraform-aws-ec2-client-vpn/releases/tag/0.13.0

[nitrocode]

@joe-niland just a heads up. When merging PRs that are fixing a bug, label the pr as patch so the auto releaser releases a patch release e.g. 0.12.7 instead of a minor release e.g. 0.13.0.

[joe-niland]

@nitrocode thanks - will do