libsysdecode: Fix a typo in my email

Reported by:		Mikaël Urankar
MFC after:		2 weeks

lib/libsysdecode/linux.c

 /*-
  * SPDX-License-Identifier: BSD-2-Clause
  *
- * Copyright (c) 2022 Dmitry Chagin <dchagin@FreeBSD.orf>
+ * Copyright (c) 2022 Dmitry Chagin <dchagin@FreeBSD.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions