fixup CI for changed hosts file

Author: sjpb

environments/.stackhpc/hooks/pre.yml

@@ -14,6 +14,6 @@
         group: root
       no_log: "{{ no_log | default(true) }}"
       loop:
-        - "{{ lookup('env', 'APPLIANCES_ENVIRONMENT_ROOT') }}/inventory/hosts"
+        - "{{ lookup('env', 'APPLIANCES_ENVIRONMENT_ROOT') }}/inventory/hosts.yml"
         - "{{ lookup('env', 'APPLIANCES_ENVIRONMENT_ROOT') }}/inventory/group_vars/all/secrets.yml"
         - "{{ lookup('env', 'APPLIANCES_ENVIRONMENT_ROOT') }}/inventory/group_vars/all/test_user.yml"