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

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

@@ -1,13 +1,9 @@
 ---
 - name: Stop container if it is running
   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 }}"
-
-    vmid: "{{ container_vmid | default(omit) }}"
-    hostname: "{{ container_hostname | default(omit) }}"
+    <<: "{{ proxmox_api_connection }}"
+    vmid: "{{ lxc_vmid | default(omit) }}"
+    hostname: "{{ lxc_hostname | default(omit) }}"
     state: "stopped"
   register: stop_result
   failed_when: |-