Update copyright year

Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14235)

engines/e_ossltest.txt

diff --git a/engines/e_ossltest.txt b/engines/e_ossltest.txt
index c6450ce..645917f 100644
--- a/engines/e_ossltest.txt
+++ b/engines/e_ossltest.txt
@@ -1,4 +1,4 @@
-# Copyright 1999-2020 The OpenSSL Project Authors. All Rights Reserved.
+# Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
 #
 # Licensed under the Apache License 2.0 (the "License").  You may not use
 # this file except in compliance with the License.  You can obtain a copy