chore: rename .yaml extensions to .yml for consistency

roles/proxmox-lxc-provision/tasks/delete.yml

@@ -0,0 +1,12 @@
+---
+- ansible.builtin.include_tasks: stop.yaml
+- name: Delete a container
+  community.general.proxmox:
+    <<: "{{ proxmox_api_connection }}"
+    vmid: "{{ lxc_vmid | default(omit) }}"
+    hostname: "{{ lxc_hostname | default(omit) }}"
+    state: absent
+  register: delete_result
+  failed_when: |
+    delete_result.failed and
+    ('does not exist' not in delete_result.msg)