Drupal 11 submitConfigurationForm incompatibility

Problem/Motivation

After upgrading to Drupal 11.2, running drush updb will throw the error:

> PHP Fatal error: Declaration of Drupal\pdb\Plugin\Block\PdbBlock::submitConfigurationForm(array &$form, Drupal\Core\Form\FormStateInterface $form_state) must be compatible with Drupal\Core\Block\BlockBase::submitConfigurationForm(array &$form, Drupal\Core\Form\FormStateInterface $form_state): void in /var/www/html/web/modules/contrib/pdb/src/Plugin/Block/PdbBlock.php on line 175
> [warning] Drush command terminated abnormally.
In ProcessBase.php line 171: