[BUGFIX] Use correct action names for custom validators

For TYPO3 v12 the first actions were renamed to `checkConfirmation` and
`checkCreate`. The test, whether the validators should be called, still
used the old action names `create` and `confirmation`.

Classes/Domain/Validator/AbstractValidator.php

@@ -108,15 +108,17 @@ public function setConfiguration(array $configuration): ValidatorInterface
      * Validation should be in mostly workflows only on first action. This is createAction. But if confirmation is
      * turned on, validation should work in most cases on the confirmationAction.
      *
+     * ToDo: for v13 rename the actions in the condition
+     *
      * @return bool
      */
     public function isFirstActionForValidation(): bool
     {
         $arguments = FrontendUtility::getArguments();
         if ($this->isConfirmationActivated()) {
-            return $arguments['action'] === 'confirmation';
+            return $arguments['action'] === 'checkConfirmation';
         }
-        return $arguments['action'] === 'create';
+        return $arguments['action'] === 'checkCreate';
     }
 
     /**