Update Terraform terraform-aws-modules/vpc/aws to v6

Author: renovate[bot]

terraform/networking/main.tf

@@ -18,7 +18,7 @@ locals {
 
 module "vpc" {
   source  = "terraform-aws-modules/vpc/aws"
-  version = "~> 5.21.0"
+  version = "~> 6.6.0"
 
   name = "homelab"
   cidr = local.cidr