Aurora PostgresSQL major version upgrade

I received a notice that "Aurora PostgresSQL major version 10.x will be de-supported and will be upgraded automatically on 01/31/2023. You can initiate an upgrade of your database instance either immediately or during your next maintenance window to a newer major version of Amazon Aurora PostgreSQL using the AWS Management Console or the AWS Command Line Interface (CLI)."

I like to test upgrade by having some dev database to upgrade to v11 during next maintenance window. Is there a way to trigger that? On the console under pending maintenance I only see the minor upgrade pending. Or should I upgrade manually?

Thanks.