fix(ansible): mv docker apt key in dedicated file

ansible/roles/k3s/tasks/containerd.yml

@@ -1,6 +1,7 @@
 - name: Add apt key
-  apt_key:
+  ansible.builtin.apt_key:
     url:  https://download.docker.com/linux/debian/gpg
+    keyring: /etc/apt/trusted.gpg.d/docker.gpg
 
 - name: Add docker-ce repository
   apt_repository: