build(deps): bump terraform-aws-modules/vpc/aws in /examples/complete (#149)

Bumps [terraform-aws-modules/vpc/aws](https://github.com/terraform-aws-modules/terraform-aws-vpc) from 5.19.0 to 5.21.0.
- [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@v5.19.0...v5.21.0)

---
updated-dependencies:
- dependency-name: terraform-aws-modules/vpc/aws
  dependency-version: 5.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

examples/complete/main.tf

@@ -4,7 +4,7 @@
 
 module "vpc" {
   source  = "terraform-aws-modules/vpc/aws"
-  version = "5.19.0"
+  version = "5.21.0"
 
   name = "${local.name}-vpc"
   cidr = local.vpc_cidr