Marking local-var as sensitive

packer/variables.pkr.hcl

@@ -24,6 +24,7 @@ variable "repo_username" {}
 variable "repo_password" {
     sensitive = true
 }
-locals {
-    iso_authenticatedurl = "https://${var.repo_username}:${var.repo_password}@${var.iso_url}"
+local "iso_authenticatedurl" {
+    expression = "https://${var.repo_username}:${var.repo_password}@${var.iso_url}"
+    sensitive  = true
 }