Update LICENSE

As requested in b/70893145, any repository that is expected to be Apache 2.0 should have the exact license file from Apache with no modifications.
diff --git a/LICENSE b/LICENSE
index 04cb0d7..261eeb9 100644
--- a/LICENSE
+++ b/LICENSE
@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2013 Google Inc.
+   Copyright [yyyy] [name of copyright owner]
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.