update: increase VM disk sizes for kubeadm nodes

terraform/terraform.tfvars

@@ -12,8 +12,8 @@ worker_vmid_start        = 711
 
 control_plane_cores     = 1
 control_plane_memory_mb = 4096
-control_plane_disk_size = "40G"
+control_plane_disk_size = "80G"
 
 worker_cores     = [4, 4, 4]
 worker_memory_mb = [12288, 12288, 12288]
-worker_disk_size = "60G"
+worker_disk_size = "120G"

terraform/variables.tf

@@ -77,13 +77,13 @@ variable "worker_memory_mb" {
 
 variable "control_plane_disk_size" {
   type        = string
-  default     = "40G"
+  default     = "80G"
   description = "Disk size for control plane VMs"
 }
 
 variable "worker_disk_size" {
   type        = string
-  default     = "60G"
+  default     = "120G"
   description = "Disk size for worker VMs"
 }