Fix licence header in quic StreamType

Signed-off-by: Lachlan Roberts <lachlan@webtide.com>

jetty-quic/quic-common/src/main/java/org/eclipse/jetty/quic/common/StreamType.java

@@ -1,3 +1,16 @@
+//
+// ========================================================================
+// Copyright (c) 1995-2021 Mort Bay Consulting Pty Ltd and others.
+//
+// This program and the accompanying materials are made available under the
+// terms of the Eclipse Public License v. 2.0 which is available at
+// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
+// which is available at https://www.apache.org/licenses/LICENSE-2.0.
+//
+// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
+// ========================================================================
+//
+
 package org.eclipse.jetty.quic.common;
 
 import java.util.HashMap;