[bugfix] Fixed passing in the list of supported services

landingzones/landingzone_caf_foundations/blueprint_foundations_governance/policies/builtin/allowed_resource_type.tf

@@ -1,6 +1,10 @@
 #Definition ID: /providers/Microsoft.Authorization/policyDefinitions/a08ec900-254a-4555-9bf5-e42af04b5c5c
 #Name: Allowed resource types
 
+locals {
+  supported_svc = "${jsonencode(var.policies_matrix.list_of_supported_svc)}"
+}
+
 resource "azurerm_policy_assignment" "res_type" {
   count                = var.policies_matrix.restrict_supported_svc ? 1 : 0
   name                 = "res_svc"
@@ -12,10 +16,8 @@ resource "azurerm_policy_assignment" "res_type" {
   parameters = <<PARAMETERS
     {
       "listOfResourceTypesAllowed": {
-        {
-                "value" : "${var.policies_matrix.list_of_supported_svc}"
-              }
-    }
+        "value" : ${local.supported_svc}
     }
+}
 PARAMETERS
 }