Update hashicorp/aws requirement from ~> 5 to ~> 6 (#596)

Updates the requirements on [hashicorp/aws](https://github.com/hashicorp/terraform-provider-aws) to permit the latest version.
- [Release notes](https://github.com/hashicorp/terraform-provider-aws/releases)
- [Changelog](https://github.com/hashicorp/terraform-provider-aws/blob/main/CHANGELOG.md)
- [Commits](hashicorp/terraform-provider-aws@v5.0.0...v6.0.0)

---
updated-dependencies:
- dependency-name: hashicorp/aws
  dependency-version: 6.0.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

terraform_aws_backup/aws-backup-destination/main.tf

@@ -2,7 +2,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = "~> 5"
+      version = "~> 6"
     }
     docker = {
       source  = "kreuzwerker/docker"