Giving up on all arguments, hardcode the path.

tasks/hardness_check_lynis.yml

@@ -6,6 +6,4 @@
     force: yes
 
 - name: Run Lynis
-  ansible.builtin.command: lynis audit system
+  ansible.builtin.command: /usr/local/lynis/lynis audit system
-  args:
-    chdir: /usr/local/lynis/