fix: Use one() function to access network set in outputs

terraform/outputs.tf

@@ -5,7 +5,7 @@ output "control_plane_ips" {
 
 output "control_plane_private_ips" {
   description = "Private IPs of control plane nodes"
-  value       = [for cp in hcloud_server.control_plane : cp.network[0].ip]
+  value       = [for cp in hcloud_server.control_plane : one(cp.network).ip]
 }
 
 output "primary_control_plane_ip" {
@@ -20,7 +20,7 @@ output "worker_ips" {
 
 output "worker_private_ips" {
   description = "Private IPs of worker nodes"
-  value       = [for worker in hcloud_server.workers : worker.network[0].ip]
+  value       = [for worker in hcloud_server.workers : one(worker.network).ip]
 }
 
 output "ssh_private_key_path" {