Add example playbook.

README.md

@@ -93,11 +93,15 @@ A list of other roles hosted on Galaxy should go here, plus any details in regar
 
 ## Example Playbook
 
-Including an example of how to use your role (for instance, with variables passed in as parameters) is always nice for users too:
-
-    - hosts: servers
+```yml
+- name: Example playbook
+  hosts: services
+  vars:
+    bonob_enabled: "true"
   roles:
-         - { role: username.rolename, x: 42 }
+    - 'laurivan.navidrome'
+
+```
 
 ## License