The class of Exception in the third argument has changed to Throwable now, so the child method needs to be updated.
Declaration of Drupal\pluginformalter\DataCollector\FormAltersDataCollector::collect(Symfony\Component\HttpFoundation\Request $request, Symfony\Component\HttpFoundation\Response $response, ?Exception $exception = null): void must be compatible with Drupal\webprofiler\DataCollector\FormsDataCollector::collect(Symfony\Component\HttpFoundation\Request $request, Symfony\Component\HttpFoundation\Response $response, ?Throwable $exception = null)
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