Change module apt with multiple packages to remove deprecated syntax

tasks/install.yml

@@ -11,12 +11,13 @@
 
 - name: "Install some packages"
   apt:
-    pkg='{{ item }}'
+    pkg='{{ packages }}'
     state=latest
-  with_items:
-    - haproxy
-    - hatop
-    - socat
+  vars:
+    packages:
+      - haproxy
+      - hatop
+      - socat
 
 - name: "create directories"
   file: