cephadm_adopt: fix a typo

This play doesn't nothing else than stopping/removing rgw daemons.

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit ee44d860)

infrastructure-playbooks/cephadm-adopt.yml

@@ -628,7 +628,7 @@
       environment:
         CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
 
-- name: redeploy rgw daemons
+- name: stop and remove legacy ceph rgw daemons
   hosts: "{{ rgw_group_name|default('rgws') }}"
   serial: 1
   become: true