fix(wg): correct check for existing private key

Registering output of ‹ansible.builtin.stat› generates an object
containing ‹stat› member itself.

Signed-off-by: Matej Focko <me@mfocko.xyz>

roles/wg/tasks/main.yml

@@ -6,11 +6,11 @@
 - name: Check for existence of private key
   ansible.builtin.stat:
     path: /etc/wireguard/private.key
-  register: _private_key_stat
+  register: _private_key
 
 - name: Generate keypair
   ansible.builtin.include_tasks: tasks/generate_keypair.yml
-  when: not _private_key_stat.exists
+  when: not _private_key.stat.exists
 
 - name: Save private key
   ansible.builtin.template:
@@ -21,7 +21,7 @@
     mode: 0700
   vars:
     key: "{{ wg_private_key }}"
-  when: not _private_key_stat.exists
+  when: not _private_key.stat.exists
 
 - name: Save public key
   ansible.builtin.template:
@@ -32,7 +32,7 @@
     mode: 0700
   vars:
     key: "{{ wg_public_key }}"
-  when: not _private_key_stat.exists
+  when: not _private_key.stat.exists
 
 - name: Set dns_command for co-openSUSE
   ansible.builtin.set_fact: