fixed export file name

app/Providers/Macro.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Providers;
+
+use Illuminate\Support\ServiceProvider;
+use Illuminate\Support\Str;
+
+class Macro extends ServiceProvider
+{
+    /**
+     * Bootstrap any application services.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        Str::macro('filename', function ($string, $separator = '-') {
+            // Replace @ with the word 'at'
+            $string = str_replace('@', $separator.'at'.$separator, $string);
+
+            // Remove all characters that are not the separator, letters, numbers, or whitespace.
+            $string = preg_replace('![^'.preg_quote($separator).'\pL\pN\s]+!u', '', $string);
+
+            // Remove multiple whitespaces
+            $string = preg_replace('/\s+/', ' ', $string);
+
+            return $string;
+        });
+    }
+
+    /**
+     * Register any application services.
+     *
+     * @return void
+     */
+    public function register()
+    {
+        //
+    }
+}