fixed typo

extensions/gii/generators/crud/templates/controller.php

@@ -31,7 +31,7 @@ namespace <?= StringHelper::dirname(ltrim($generator->controllerClass, '\\')) ?>
 
 use Yii;
 use <?= ltrim($generator->modelClass, '\\') ?>;
-use <?= ltrim($generator->searchModelClass, '\\') . (isset($searchModelClass) ? " as $searchModelClass" : "") ?>;
+use <?= ltrim($generator->searchModelClass, '\\') . (isset($searchModelAlias) ? " as $searchModelAlias" : "") ?>;
 use <?= ltrim($generator->baseControllerClass, '\\') ?>;
 use yii\web\NotFoundHttpException;
 use yii\web\VerbFilter;