Fix example playbook

README.md

@@ -35,11 +35,10 @@ None
 Example Playbook
 ----------------
 
-    - hosts: docker_owncloud
-      gather_facts: false
+    - hosts: owncloud_server
       become: true
       roles:
-      - { role: docker_owncloud, tags: docker_owncloud }
+      - { role: owncloud, tags: owncloud }
       vars:
       - { cloud_url: "owncloud.example.org" }