Change module apt with multiple packages to remove deprecated syntax

tasks/main.yml

@@ -8,8 +8,9 @@
 - block:
 
   - name: 'APT-Proxy | Install required packages'
-    apt: pkg={{item}} state=present
-    with_items:
-      - apt-cacher-ng
+    apt: pkg={{ packages }} state=present
+    vars:
+      packages:
+        - apt-cacher-ng
 
   when: '"aptproxy" not in excluded_roles'