change regex security for z12c

variable "security" { type = string description = "The urbassec zone of the account" default = "" validation { condition = var.security != "" ? var.security == lower(var.security) : true error_message = "The subnet zone must be in lowercase." } validation { condition = var.security != "" ? can(regex("^z[0-2]?[0-9]|12c$", var.security)) : true error_message = "The subnet zone must be in format: zi (^z[0-2]?[0-9]|12c$)." } }