fix: use refresh instead of update var (#24)

Replace item.update with item.refresh since item.update does not work. See https://docs.ansible.com/ansible/latest/reference_appendices/faq.html#ansible-allows-dot-notation-and-array-notation-for-variables-which-notation-should-i-use

roles/vm/tasks/main.yml

@@ -18,7 +18,7 @@
     node: "{{ item.node }}"
     scsi: "{{ item.scsi | default(omit) }}"
     scsihw: "{{ item.scsihw | default(omit) }}"
-    update: "{{ item.update | default(omit) }}"
+    update: "{{ item.refresh | default(omit) }}"
     validate_certs: "{{ proxmox_api_validate_certs }}"
     virtio: "{{ item.virtio | default(omit) }}"
     vmid: "{{ item.vmid }}"