Fix filename of admin password file

ansible/group_vars/all/oas.yml

@@ -25,7 +25,7 @@ grafana_admin_password: "{{ lookup('password', '{{ cluster_dir }}/secrets/grafan
 userpanel_oauth_client_secret: "{{ lookup('password', '{{ cluster_dir }}/secrets/userpanel_oauth_client_secret chars=ascii_letters') }}"
 userbackend_postgres_password: "{{ lookup('password', '{{ cluster_dir }}/secrets/userbackend_postgres_password chars=ascii_letters') }}"
 userbackend_admin_username: "admin"
-userbackend_admin_password: "{{ lookup('password', '{{ cluster_dir }}/secrets/userbackend_admin_username chars=ascii_letters') }}"
+userbackend_admin_password: "{{ lookup('password', '{{ cluster_dir }}/secrets/userbackend_admin_password chars=ascii_letters') }}"
 userbackend_admin_email: "{{ admin_email }}"
 hydra_system_secret: "{{ lookup('password', '{{ cluster_dir }}/secrets/hydra_system_secret chars=ascii_letters') }}"