Update copyright notice in EscapedKeyBugTest.java

Author: simbo1905

json-java21/src/test/java/jdk/sandbox/java/util/json/EscapedKeyBugTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2025, Simon Massey. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -99,4 +99,4 @@ public void testMultipleEscapedCharactersInKey() {
         // Verify key with multiple escaped characters is parsed correctly
         assertEquals(1L, ((JsonNumber) obj.members().get("foo\n\t\"bar")).toNumber());
     }
-}
+}