Adapt AccountMigratorTest to id change

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

Author: come-nc

apps/settings/tests/UserMigration/AccountMigratorTest.php

@@ -98,7 +98,7 @@ public function testImportExportAccount(string $userId, array $importData): void
 		$this->importSource
 			->expects($this->once())
 			->method('getMigratorVersion')
-			->with(AccountMigrator::class)
+			->with($this->migrator->getId())
 			->willReturn(1);
 
 		$this->importSource