fix 🐛: Update Proxmox credentials

This commit updates the Proxmox credentials within the testing task file.  This ensures the testing environment can successfully authenticate with Proxmox, resolving potential connection issues.  The change improves the reliability of automated testing.

tasks/testing.yml

@@ -116,8 +116,9 @@
     ansible.builtin.include_role: 
       name: ansible-role-debian_common
 
-    # vars:
-    #       # Proxmox credentials
-    #       ansible_user: "{{ ciuser }}"
+    vars:
+          # Proxmox credentials
+          ansible_user: "{{ ciuser }}"
+          ansible_password: "{{ cipassword }}"