[TASK] Fixing wrong tablename in siteroot query of the be module

Classes/Service/MailTemplateService.php

@@ -519,7 +519,7 @@ class MailTemplateService {
 				'pages'
 			);
 			$rootPageRows = $queryBuilder->select('*')
-				->from('tx_sgshop_domain_model_voucher')
+				->from('pages')
 				->where(
 					$queryBuilder->expr()->eq(
 						'is_siteroot', 1