Use fully-qualified module names for builtin Ansible modules

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

roles/matrix-nginx-proxy/tasks/ssl/main.yml

@@ -1,12 +1,12 @@
 ---
 
 - name: Fail if using unsupported SSL certificate retrieval method
-  fail:
+  ansible.builtin.fail:
     msg: "The `matrix_ssl_retrieval_method` variable contains an unsupported value"
   when: "matrix_ssl_retrieval_method not in ['lets-encrypt', 'self-signed', 'manually-managed', 'none']"
 
 - name: Fail if using unsupported private key type
-  fail:
+  ansible.builtin.fail:
     msg: "The `matrix_ssl_lets_encrypt_key_type` variable contains an unsupported value"
   when: "matrix_ssl_lets_encrypt_key_type not in ['rsa', 'ecdsa']"
 
@@ -14,7 +14,7 @@
 # Common tasks, required by almost any method below.
 
 - name: Ensure SSL certificate paths exists
-  file:
+  ansible.builtin.file:
     path: "{{ item }}"
     state: directory
     mode: 0770