roles/mariadb: Update comments for Ansible module

roles/mariadb/tasks/main.yml

@@ -29,8 +29,7 @@
     - restart mariadb
   tags: mariadb
 
-# 'localhost' needs to be the last item for idempotency, see
-# https://docs.ansible.com/ansible/latest/mysql_user_module.html
+# See: https://docs.ansible.com/ansible/latest/collections/community/mysql/mysql_user_module.html
 - name: Update MariaDB root password for all root accounts
   mysql_user: name=root host={{ item }} password={{ mariadb_root_password }} login_unix_socket={{ mariadb_login_unix_socket }}
   loop:
@@ -42,6 +41,7 @@
   template: src=.my.cnf.j2 dest=/root/.my.cnf owner=root mode=0600
   tags: mariadb
 
+# See: https://docs.ansible.com/ansible/latest/collections/community/mysql/mysql_db_module.html
 - name: Create MariaDB database(s)
   mysql_db: db={{ item.name }} state=present encoding=utf8mb4
   loop: "{{ mariadb_databases }}"