output.tf now needs sensitive annotation

[jgrangethales]

terraform failing with version 0.15.3 with

│ Error: Output refers to sensitive values
│
│ on outputs.tf line 26:
│ 26: output "vm-user-password" {
│
│ To reduce the risk of accidentally exporting sensitive data that was intended to be only internal, Terraform requires that any root module output containing sensitive data be explicitly marked as sensitive,
│ to confirm your intent.
│
│ If you do intend to export this data, annotate the output value as sensitive by adding the following argument:
│ sensitive = true
╵