Use fully-qualified module names for builtin Ansible modules

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

roles/matrix-registration/tasks/init.yml

@@ -2,17 +2,17 @@
 # See https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1070
 # and https://github.com/spantaleev/matrix-docker-ansible-deploy/commit/1ab507349c752042d26def3e95884f6df8886b74#commitcomment-51108407
 - name: Fail if trying to self-build on Ansible < 2.8
-  fail:
+  ansible.builtin.fail:
     msg: "To self-build the Element image, you should use Ansible 2.8 or higher. See docs/ansible.md"
   when: "ansible_version.major == 2 and ansible_version.minor < 8 and matrix_registration_container_image_self_build and matrix_registration_enabled"
 
-- set_fact:
+- ansible.builtin.set_fact:
     matrix_systemd_services_list: "{{ matrix_systemd_services_list + ['matrix-registration.service'] }}"
   when: matrix_registration_enabled|bool
 
 - block:
     - name: Fail if matrix-nginx-proxy role already executed
-      fail:
+      ansible.builtin.fail:
         msg: >-
           Trying to append matrix-registration's reverse-proxying configuration to matrix-nginx-proxy,
           but it's pointless since the matrix-nginx-proxy role had already executed.
@@ -21,7 +21,7 @@
       when: matrix_nginx_proxy_role_executed|default(False)|bool
 
     - name: Generate matrix-registration proxying configuration for matrix-nginx-proxy
-      set_fact:
+      ansible.builtin.set_fact:
         matrix_registration_matrix_nginx_proxy_configuration: |
           rewrite ^{{ matrix_registration_public_endpoint }}$ {{ matrix_nginx_proxy_x_forwarded_proto_value }}://$server_name{{ matrix_registration_public_endpoint }}/ permanent;
           rewrite ^{{ matrix_registration_public_endpoint }}/$ {{ matrix_nginx_proxy_x_forwarded_proto_value }}://$server_name{{ matrix_registration_public_endpoint }}/register redirect;
@@ -47,7 +47,7 @@
           }
 
     - name: Register matrix-registration proxying configuration with matrix-nginx-proxy
-      set_fact:
+      ansible.builtin.set_fact:
         matrix_nginx_proxy_proxy_matrix_additional_server_configuration_blocks: |
           {{
             matrix_nginx_proxy_proxy_matrix_additional_server_configuration_blocks|default([])
@@ -59,7 +59,7 @@
   when: matrix_registration_enabled|bool
 
 - name: Warn about reverse-proxying if matrix-nginx-proxy not used
-  debug:
+  ansible.builtin.debug:
     msg: >-
       NOTE: You've enabled the matrix-registration tool but are not using the matrix-nginx-proxy
       reverse proxy.