promtool update not available but still recommended

[copolycube]

in : ansible/roles/prometheus/tasks/preflight.yml

- name: Alert when alert rules files are found in the old .rules format
  ansible.builtin.debug:
    msg: >
      prometheus_alert_rules_files contains rules in the old .rules file format.
      This format has been deprecated in favour of the new YAML format since Prometheus v2.x.
      You can update your rules using promtool: promtool update rules <filenames>

      If your rules are already in the YAML format but with the .rules extension, you can safely ignore this message,
      or rename the files to <filename>.yaml or <filename>.yml to get rid of it.
  when: prometheus_alert_rules_files | select('search', '.rules$') | list | length > 0

but promtool update has been removed since 2.5 according to :
prometheus/prometheus#6988