fix owner label on gcp (#4)

gcp.tf

@@ -8,7 +8,7 @@ resource "google_dns_managed_zone" "gcp_sub_zone" {
  description = "Managed by Terraform, Delegated Sub Zone for GCP for ${var.namespace}"
  labels = {
  name = var.namespace
- owner = var.owner
+ owner = replace(var.owner, "/@|\\./", "-")
  created-by = var.created-by
  }
-}
+}