chore(deps): Bump vpc1::terraform-aws-vpc in /tests/tgw

Bumps [vpc1::terraform-aws-vpc](https://github.com/terraform-aws-modules/terraform-aws-vpc) from 5.6.0 to 5.7.0.
- [Release notes](https://github.com/terraform-aws-modules/terraform-aws-vpc/releases)
- [Changelog](https://github.com/terraform-aws-modules/terraform-aws-vpc/blob/master/CHANGELOG.md)
- [Commits](terraform-aws-modules/terraform-aws-vpc@v5.6.0...v5.7.0)

---
updated-dependencies:
- dependency-name: vpc1::github::terraform-aws-modules/terraform-aws-vpc::v5.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

tests/tgw/main.tf

@@ -135,7 +135,7 @@ locals {
 }
 
 module "vpc1" {
-  source = "git::https://github.com/terraform-aws-modules/terraform-aws-vpc.git?ref=v5.6.0"
+  source = "git::https://github.com/terraform-aws-modules/terraform-aws-vpc.git?ref=v5.7.0"
 
   name            = "tardigrade-testing-vpc1-${local.id}"
   cidr            = "10.0.0.0/16"