fix: restrict aws provider to <4 for this major branch (#47)

Author: jim80net

versions.tf

@@ -6,5 +6,10 @@ terraform {
       source  = "DataDog/datadog"
       version = ">= 2.10, < 3"
     }
+
+    aws = {
+      source = "hashicorp/aws"
+      version = ">= 3.0, < 4"
+    }
   }
 }