fix: rename files to .yaml

tasks/main.yaml

@@ -12,7 +12,7 @@
   when: "'vmx' not in cpu_info.stdout and 'svm' not in cpu_info.stdout"
 
 - name: Include OS-specific variables
-  ansible.builtin.include_vars: "{{ ansible_os_family }}.yml"
+  ansible.builtin.include_vars: "{{ ansible_facts['os_family'] }}.yaml"
 
 - name: Add virt-manager to list of kvm packages
   ansible.builtin.set_fact: