Update ApiV1Controller, fix link header pagination

app/Http/Controllers/Api/ApiV1Controller.php

@@ -1254,7 +1254,7 @@ class ApiV1Controller extends Controller
 
         $baseUrl = config('app.url') . '/api/v1/notifications?';
 
-        $link = "<{$baseUrl}max_id={$maxId}>; rel='next',<{$baseUrl}min_id={$minId}>; rel='prev'";
+        $link = '<'.$baseUrl.'max_id='.$maxId.'>; rel="next",<'.$baseUrl.'min_id='.$minId.'>; rel="prev"';
 
         return response()->json($res)->withHeaders([
             'Link' => $link,