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

Bumps [vpc_member::terraform-aws-vpc](https://github.com/terraform-aws-modules/terraform-aws-vpc) from 5.5.3 to 5.6.0.
- [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@v5.5.3...v5.6.0)

---
updated-dependencies:
- dependency-name: vpc_member::github::terraform-aws-modules/terraform-aws-vpc::v5.5.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

tests/cross-account-vpc-attachment/main.tf

@@ -182,7 +182,7 @@ module "ram_share_accepter" {
 }
 
 module "vpc_member" {
-  source = "git::https://github.com/terraform-aws-modules/terraform-aws-vpc.git?ref=v5.5.3"
+  source = "git::https://github.com/terraform-aws-modules/terraform-aws-vpc.git?ref=v5.6.0"
 
   name            = "tardigrade-tgw-${local.id}"
   cidr            = "10.1.0.0/16"