Fix protocol name to be valid identifier

Change-Id: Ifbd61c34ea7d858230b59c0208d3e8f7b40378a7
diff --git a/protocol/webos-extension.xml b/protocol/webos-extension.xml
index d01065f..401017f 100644
--- a/protocol/webos-extension.xml
+++ b/protocol/webos-extension.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<protocol name="webos-extension">
+<protocol name="webos_extension">
 
   <copyright>
-    Copyright (c) 2013-2019 LG Electronics, Inc.
+    Copyright (c) 2013-2020 LG Electronics, Inc.
 
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.