rename variable to distinguish vm from host

roles/lxc_guest/tasks/main.yaml

@@ -64,7 +64,7 @@
   container_file_exists:
     name: "{{ vm_name }}"
     path: "/etc/ssh/ssh_host_ed25519_key-cert.pub"
-  register: host_certificate_exists
+  register: vm_ssh_certificate_exists
 
 - name: check if cert key exist
   shell: lxc-attach -n {{ vm_name }} --clear-env -e -- bash -c "ls /etc/ssh/ssh_host_ed25519_key-cert.pub"