chore: rename .yaml extensions to .yml for consistency

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

@@ -0,0 +1,8 @@
+---
+- ansible.builtin.include_tasks: stop.yaml
+- name: Convert container to template
+  community.general.proxmox:
+    <<: "{{ proxmox_api_connection }}"
+
+    state: template
+    hostname: "{{ lxc_hostname }}"