Update aws requirement from ~> 4.0 to ~> 5.56 in /infrastructure

Updates the requirements on aws to permit the latest version.

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

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

infrastructure/provider.tf

@@ -4,7 +4,7 @@
 terraform {
   required_providers {
     aws = {
-      version = "~> 4.0"
+      version = "~> 5.56"
     }
   }
 }