chore(deps): Bump vpc::terraform-aws-vpc

Bumps [vpc::terraform-aws-vpc](https://github.com/terraform-aws-modules/terraform-aws-vpc) from 5.14.0 to 5.15.0.
- [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@v5.14.0...v5.15.0)

---
updated-dependencies:
- dependency-name: vpc::github::terraform-aws-modules/terraform-aws-vpc::v5.14.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

tests/create_vpn_gateway_with_connections/main.tf

@@ -27,7 +27,7 @@ module "vpn_gateway" {
 }
 
 module "vpc" {
-  source = "github.com/terraform-aws-modules/terraform-aws-vpc?ref=v5.14.0"
+  source = "github.com/terraform-aws-modules/terraform-aws-vpc?ref=v5.15.0"
 
   name = "tardigrade-vpn-connection-${local.id}"
   cidr = "10.0.0.0/16"