attachments upload

be/app/Http/Resources/AttachmentResource.php

@@ -18,11 +18,10 @@ class AttachmentResource extends JsonResource
             'id' => $this->id,
             'content_type' => $this->content_type,
             'disk_name' => $this->disk_name,
-            'extension' => $this->estimated_time,
+            'extension' => $this->extension,
             'name' => $this->original_name,
             'file_size' => $this->file_size,
             'path' => $this->path,
-
         ];
     }
 }