Use fully-qualified module names for builtin Ansible modules

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1939

roles/matrix-dendrite/tasks/register_user.yml

@@ -1,16 +1,16 @@
 ---
 - name: Fail if playbook called incorrectly
-  fail:
+  ansible.builtin.fail:
     msg: "The `username` variable needs to be provided to this playbook, via --extra-vars"
   when: "username is not defined or username == '<your-username>'"
 
 - name: Fail if playbook called incorrectly
-  fail:
+  ansible.builtin.fail:
     msg: "The `password` variable needs to be provided to this playbook, via --extra-vars"
   when: "password is not defined or password == '<your-password>'"
 
 - name: Ensure matrix-dendrite is started
-  service:
+  ansible.builtin.service:
     name: matrix-dendrite
     state: started
     daemon_reload: true
@@ -22,4 +22,4 @@
   when: "start_result.changed"
 
 - name: Register user
-  command: "{{ matrix_local_bin_path }}/matrix-dendrite-create-account {{ username|quote }} {{ password|quote }}"
+  ansible.builtin.command: "{{ matrix_local_bin_path }}/matrix-dendrite-create-account {{ username|quote }} {{ password|quote }}"