Merge pull request #4276 from cvium/fix_403

SecurityException should return 403

Jellyfin.Server/Middleware/ExceptionMiddleware.cs

@@ -125,8 +125,8 @@ namespace Jellyfin.Server.Middleware
             switch (ex)
             {
                 case ArgumentException _: return StatusCodes.Status400BadRequest;
-                case AuthenticationException _:
-                case SecurityException _: return StatusCodes.Status401Unauthorized;
+                case AuthenticationException _: return StatusCodes.Status401Unauthorized;
+                case SecurityException _: return StatusCodes.Status403Forbidden;
                 case DirectoryNotFoundException _:
                 case FileNotFoundException _:
                 case ResourceNotFoundException _: return StatusCodes.Status404NotFound;