resolve comments

quickstart/201-confidential-vm/variables.tf

@@ -3,13 +3,12 @@ variable "location" {
   description = "Location where resources will be created"
 }
 
+variable "name_prefix" {
+  type        = string
+  description = "Prefix of the resource name"
+}
+
 variable "vm_public_key" {
   type        = string
   description = "Public key of the Virtual Machine"
 }
-
-variable "name_prefix" {
-  type        = string
-  default     = "tftest"
-  description = "Prefix of the resource name"
-}