8332100: Add missing @since to KeyValue::EC_TYPE in java.xml.crypto

Reviewed-by: mullan

src/java.xml.crypto/share/classes/javax/xml/crypto/dsig/keyinfo/KeyValue.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2024, Oracle and/or its affiliates. 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
@@ -152,6 +152,8 @@ public interface KeyValue extends XMLStructure {
      * the value of the <code>type</code> parameter of the
      * {@link RetrievalMethod} class to describe a remote
      * <code>ECKeyValue</code> structure.
+     *
+     * @since 13
      */
     static final String EC_TYPE =
         "http://www.w3.org/2009/xmldsig11#ECKeyValue";