Updating copyright

Signed-off-by: Adam Knapp <adam.knapp@ericsson.com>

src/JSON_Generic.ttcn

 /******************************************************************************
-* Copyright (c) 2000-2019 Ericsson Telecom AB AB
+* Copyright (c) 2000-2023 Ericsson Telecom AB AB
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at

src/JSON_Generic_Null_Def.asn

 --******************************************************************************
--- Copyright (c) 2000-2019 Ericsson Telecom AB
+-- Copyright (c) 2000-2023 Ericsson Telecom AB
 -- All rights reserved. This program and the accompanying materials
 -- are made available under the terms of the Eclipse Public License v1.0
 -- which accompanies this distribution, and is available at