Notify handler instead of updating apt cache as task

tasks/main.yml

@@ -20,10 +20,10 @@
   apt_repository:
     repo: deb https://download.docker.com/linux/debian buster stable
     state: present
+  notify: Update apt cache
 
-- name: Update apt cache
-  apt: 
-    update_cache: yes
+- name: Flush handlers
+  meta: flush_handlers
 
 - name: Configure docker daemon
   template: