Rename the copyright authors from NXT to Dawn
diff --git a/examples/CppHelloTriangle.cpp b/examples/CppHelloTriangle.cpp
index 20ad5b2..9da6e19 100644
--- a/examples/CppHelloTriangle.cpp
+++ b/examples/CppHelloTriangle.cpp
@@ -1,4 +1,4 @@
-// Copyright 2017 The NXT Authors
+// Copyright 2017 The Dawn Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.