Use fully-qualified module names for builtin Ansible modules

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

roles/matrix-bridge-mautrix-facebook/tasks/validate_config.yml

@@ -1,7 +1,7 @@
 ---
 
 - name: Fail if required settings not defined
-  fail:
+  ansible.builtin.fail:
     msg: >-
       You need to define a required configuration setting (`{{ item }}`).
   when: "vars[item] == ''"
@@ -12,7 +12,7 @@
 
 - block:
     - name: Inject warning if on an old SQLite-supporting version
-      set_fact:
+      ansible.builtin.set_fact:
         matrix_playbook_runtime_results: |
           {{
             matrix_playbook_runtime_results|default([])