fix: html to pdf document -> has erp entity

src/QUI/ERP/Output/OutputTemplate.php

@@ -178,6 +178,8 @@ public function getPDFDocument(): QUI\HtmlToPdf\Document
             'pageNumbersPrefix' => $Locale->get('quiqqer/htmltopdf', 'footer.page.prefix')
         ]);
 
+        $Document->setAttribute('Entity', $this->Entity);
+
         QUI::getEvents()->fireEvent(
             'quiqqerErpOutputPdfCreate',
             [$this, $Document]