ipaconfig: Fix example playbook titles.

playbooks/config/retrieve-config.yml

 ---
-- name: Playbook to handle global DNS configuration
+- name: Playbook to handle global IPA configuration
   hosts: ipaserver
   become: no
   gather_facts: no

playbooks/config/set-ca-renewal-master-server.yml

 ---
-- name: Playbook to handle global DNS configuration
+- name: Playbook to handle global IPA configuration
   hosts: ipaserver
   become: no
   gather_facts: no