Variables references in comments are not updated when variable name was updated

[AlexSkrypnyk]

Before

  /** @var \Drupal\Core\Extension\ModuleHandler $moduleHandler */
  $moduleHandler = \Drupal::service('module_handler');

After

  /** @var \Drupal\Core\Extension\ModuleHandler $moduleHandler */
  $module_handler = \Drupal::service('module_handler');

Expected

  /** @var \Drupal\Core\Extension\ModuleHandler $module_handler */
  $module_handler = \Drupal::service('module_handler');