changed "DbDateTime" to "UtopiaDateTime"

Author: ArnabChatterjee20k

src/Migration/Sources/Appwrite.php

@@ -11,7 +11,7 @@
 use Appwrite\Services\Teams;
 use Appwrite\Services\Users;
 use Utopia\Database\Database as UtopiaDatabase;
-use Utopia\Database\DateTime as DbDateTime;
+use Utopia\Database\DateTime as UtopiaDateTime;
 use Utopia\Migration\Exception;
 use Utopia\Migration\Resource;
 use Utopia\Migration\Resources\Auth\Hash;
@@ -922,8 +922,8 @@ private function exportIndexes(int $batchSize): void
                         $index['attributes'],
                         [],
                         $index['orders'],
-                        $index['$createdAt'] = empty($index['$createdAt']) ? DbDateTime::now() : $index['$createdAt'],
-                        $index['$updatedAt'] = empty($index['$updatedAt']) ? DbDateTime::now() : $index['$updatedAt'],
+                        $index['$createdAt'] = empty($index['$createdAt']) ? UtopiaDateTime::now() : $index['$createdAt'],
+                        $index['$updatedAt'] = empty($index['$updatedAt']) ? UtopiaDateTime::now() : $index['$updatedAt'],
                     );
                 }