Fix Update VM hardware task

tasks/proxmox.yml

@@ -61,6 +61,10 @@
     memory: "{{ create_vm_proxmox_memory_mb | default(omit) }}"
     update: true
   delegate_to: localhost
+  when:
+    - create_vm_proxmox_numb_cpus is defined or
+      create_vm_proxmox_numb_cores is defined or
+      create_vm_proxmox_memory_mb is defined
 
 - name: Proxmox - Manage virtual disks for virtual machine
   community.general.proxmox_disk: