Add missing using

Jellyfin.Api/Controllers/GenresController.cs

@@ -10,6 +10,7 @@ using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Model.Dto;
 using MediaBrowser.Model.Querying;
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
 using Genre = MediaBrowser.Controller.Entities.Genre;