chore(deps): restrict aws provider version to < 6.0.0 (#28)

Author: Benbentwo

src/modules/mysql-user/versions.tf

@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 4.0"
+      version = ">= 4.0, < 6.0.0"
     }
     mysql = {
       source  = "petoju/mysql"

src/versions.tf

@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 4.0"
+      version = ">= 4.0, < 6.0.0"
     }
     # terraform-providers/mysql is archived
     # https://github.com/hashicorp/terraform-provider-mysql