Outdated SQL serverPerformance
The SQL server is a required piece of software for the database WordPress uses to store all your site’s content and settings.
For optimal performance and security reasons, you should consider running MariaDB version 10.4 or higher. Contact your web hosting company to correct this.
Ubuntu 20.04 (64 Bit) 10.3.38-MariaDB
How to upgrade it to MariaDB version 10.4？
How to upgrade it please, anyone know?