Report export: fix Report tab translation

CRM/CiviExportExcel/Utils/Report.php

@@ -99,7 +99,7 @@ class CRM_CiviExportExcel_Utils_Report extends CRM_Core_Page {
       ]));
 
     $sheet = $objPHPExcel->setActiveSheetIndex(0);
-    $objPHPExcel->getActiveSheet()->setTitle('Report');
+    $objPHPExcel->getActiveSheet()->setTitle(E::ts('Report'));
 
     // Replace internal header names with friendly ones, where available.
     foreach ($columnHeaders as $header) {