renamed vars to use 'lxc' prefix instead of 'container'

roles/proxmox-lxc-provision/tasks/convert.yaml

@@ -2,11 +2,7 @@
 - ansible.builtin.include_tasks: stop.yaml
 - name: Convert container to template
   community.general.proxmox:
-    api_user: "{{ proxmox_api_user }}"
-    api_token_id: "{{ proxmox_api_token_id }}"
-    api_token_secret: "{{ proxmox_api_token_secret }}"
-    api_host: "{{ proxmox_api_host }}"
-    node: server
+    <<: "{{ proxmox_api_connection }}"
 
     state: template
-    hostname: "{{ container_hostname }}"
+    hostname: "{{ lxc_hostname }}"