Update src/test/java/org/eclipse/yasson/jsonstructure/Issue673.java

Co-authored-by: Kyle Aure <KyleJAure@gmail.com>

Author: redmitry

src/test/java/org/eclipse/yasson/jsonstructure/Issue673.java

@@ -1,4 +1,6 @@
 /*
+ * Copyright (c) 2026 Contributors to the Eclipse Foundation
+ *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0 which is available at
  * http://www.eclipse.org/legal/epl-2.0,