fix: add aws provider constraints

Author: kirylkaminski

examples/cloudwatch-alerts-to-slack/versions.tf

@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 4.8"
+      version = ">= 6.0"
     }
     random = {
       source  = "hashicorp/random"

examples/notify-slack-simple/versions.tf

@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 4.8"
+      version = ">= 6.0"
     }
     local = {
       source  = "hashicorp/local"

versions.tf

@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 4.8"
+      version = ">= 6.0"
     }
   }
 }