Update cache only once

tasks/main.yml

@@ -13,13 +13,16 @@
   tags:
         - apt
   when: (apt.repos| default([])) | length
+- name: Update cache
+  apt:
+        update_cache: true
+  tags: apt
 - name: Install packages
   loop: "{{ apt.packages }}"
   apt:
         install_recommends: no
         name: "{{ item.package }}"
         state: "{{ item.state }}"
-        cache_valid_time: 3600
   tags:
         - packages
         - apt