csv export missing file extension

small patch to add missing file extension to the csv exports. oops.

app/Http/Controllers/ExportController.php

@@ -30,10 +30,13 @@ class ExportController extends Controller
             }
             array_push($list, ["heatRating" => $rating, "ratingCount" => $count]);
         }
-        return view('front.exports', [
+        return view(
+            'front.exports',
+            [
                 'title' => "Exports",
                 'list'  => $list
-        ]);
+            ]
+        );
     }
 
     //
@@ -77,7 +80,7 @@ class ExportController extends Controller
         }
 
         header('Content-Type: text/csv');
-        header('Content-Disposition: attachment; filename=' . $type . "-" . $percent);
+        header('Content-Disposition: attachment; filename=' . $type . "-" . $percent . ".csv");
 
         echo implode(',', $columns) . PHP_EOL;
         foreach ($list as $item) {