style 💎: Improve host variable formatting in setupacdc.yml

Updated the `hosts` variable to use double quotes for better readability and consistency with other Ansible variables.

tasks/setupacdc.yml

@@ -79,6 +79,6 @@
     #     ansible_user: root
 
 - name: Provision inside {{ addc_hostname }} LXC
-  hosts: {{ addc_hostname }}
+  hosts: "{{ addc_hostname }}"
   gather_facts: false
   become: true