Automated Project Update Bot fixes

This merge request was automatically created by the Project Update Bot. It contains the changes from run 11-153213.

src/Form/MigrateWizardMappingForm.php

@@ -124,7 +124,7 @@ class MigrateWizardMappingForm extends ConfigFormBase {
   /**
    * {@inheritdoc}
    */
-  public function submitForm(array &$form, FormStateInterface $form_state) {
+  public function submitForm(array &$form, FormStateInterface $form_state): void {
 
     $user_inputs = $form_state->getUserInput();
     foreach ($this->originFormats as $origin_format) {