Fix variable types

modules/security_hub/variables.tf

@@ -1,11 +1,11 @@
 variable "member_accounts" {
-  type        = map
+  type        = map(string)
   default     = {}
   description = "A map of accounts that should be added as SecurityHub Member Accounts (format: account_id = email)"
 }
 
 variable "product_arns" {
-  type        = list
+  type        = list(string)
   default     = []
   description = "A list of the ARNs of the products you want to import into Security Hub"
 }

variables.tf

@@ -29,7 +29,7 @@ variable "aws_guardduty" {
 }
 
 variable "aws_okta_group_ids" {
-  type        = list
+  type        = list(string)
   default     = []
   description = "List of Okta group IDs that should be assigned the AWS SSO Okta app"
 }
@@ -80,6 +80,6 @@ variable "monitor_iam_access" {
 }
 
 variable "tags" {
-  type        = map
+  type        = map(string)
   description = "Map of tags"
 }