Update NOTICE.txt (#118)

diff --git a/NOTICE.txt b/NOTICE.txt
index abe2711..99850df 100644
--- a/NOTICE.txt
+++ b/NOTICE.txt
@@ -1,4 +1,4 @@
-Apache OpenWhisk Runtime NodeJS
+Apache OpenWhisk Runtime Node.js
 Copyright 2016-2019 The Apache Software Foundation
 
 This product includes software developed at