Update dynamic overrides section for in and not_in (#840)

Co-authored-by: Matt White <16320656+matt-FFFFFF@users.noreply.github.com>

resources.policy_assignments.tf

@@ -25,8 +25,8 @@ resource "azurerm_management_group_policy_assignment" "enterprise_scale" {
       dynamic "selectors" {
         for_each = try({ for i, selector in overrides.value.selectors : i => selector }, local.empty_map)
         content {
-          in     = try(selectors.in, local.empty_list)
-          not_in = try(selectors.not_in, local.empty_list)
+          in     = try(selectors.value.in, local.empty_list)
+          not_in = try(selectors.value.not_in, local.empty_list)
         }
       }
     }