Update Excel.php

Author: mouyong

src/Utils/Excel.php

@@ -402,7 +402,7 @@ public static function setCellStyle(Event $event, string $cellOrRange, array $st
         $titleStyle = array_merge([
             'font' => [
                 'bold' => true,
-                'size' => 14,
+                'size' => 11,
             ],
             'alignment' => [
                 'horizontal' => \PhpOffice\PhpSpreadsheet\Style\Alignment::HORIZONTAL_CENTER,