chore: code style

app/Http/Resources/HoldingResource.php

@@ -31,7 +31,7 @@ class HoldingResource extends JsonResource
             'market_gain_dollars' => $this->market_gain_dollars,
             'market_gain_percent' => $this->market_gain_percent,
             'created_at' => $this->created_at,
-            'updated_at' => $this->updated_at
+            'updated_at' => $this->updated_at,
         ];
     }
 }

app/Http/Resources/UserResource.php

@@ -8,7 +8,7 @@ use Illuminate\Http\Request;
 use Illuminate\Http\Resources\Json\JsonResource;
 
 class UserResource extends JsonResource
-{   
+{
     /**
      * Transform the resource into an array.
      *