feat: install haproxy with explicit apt chache update

ansible/01-playbook/roles/haproxy/tasks/main.yaml

 ---
 - name: Ensure HAProxy is installed.
-  package: name=haproxy state=present
+  ansible.builtin.apt:
+    update_cache: true
+    name: haproxy
+    state: present
 
 - name: Ensure HAProxy is enabled (so init script will start it on Debian).
   lineinfile: