Magento2 upgrading to 2.3.3 SQLSTATE[HY000] [2002] Connection refused

I’m trying to follow the devdoc instructions for a CLI upgrade from 2.3.2 to 2.3.3 but I’m getting this Connection refused error partway through the process. My app/etc/env.php looks like this… ‘db’ => [ ‘table_prefix’ => ”, ‘connection’ => [ ‘default’ => [ ‘host’ => ‘127.0.0.1’, ‘dbname’ => ‘my_database_name’, ‘username’ => ‘my_database_user’, ‘password’ => ‘my_database_password’,…