Make routers configurable as list for DNS Zone

[Richie1710]

Based on documentation I can only add one router to the DNS zone

https://registry.terraform.io/providers/opentelekomcloud/opentelekomcloud/latest/docs/resources/dns_zone_v2

as you can see in attached screenshot its possible to add multiple VPCs/routers to one Service Zone

[anton-sidelnikov]

Hi @Richie1710,
I will update example block:

resource "opentelekomcloud_dns_zone_v2" "zone_1" {
  name        = "test"
  email       = "email1@example.com"
  description = "a private zone"
  ttl         = 3000
  type        = "private"

  router {
    router_id     = "first"
    router_region = "eu-de"
  }

  router {
    router_id     = "second"
    router_region = "eu-de"
  }
}