Update hashicorp/aws requirement from ~> 5.71.0 to ~> 5.73.0

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@v5.71.0...v5.73.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

terraform/providers.tf

@@ -3,7 +3,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = "~> 5.71.0"
+      version = "~> 5.73.0"
     }
   }
 }