Fix example playbook linters

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible-plugins/+/896017
Change-Id: I19aa9c5e915aa7e71617de6556d1eccff1a93ebb

examples/playbook.yml

@@ -3,7 +3,9 @@
   hosts: octavia_all
   user: root
   roles:
-    - { role: "os_octavia", tags: [ "os-octavia" ] }
+    - role: os_octavia
+      tags:
+        - os-octavia
   vars:
     external_lb_vip_address: 172.16.24.1
     internal_lb_vip_address: 192.168.0.1