Fixed copyright for ament_cmake

Author: fmauch

CONTRIBUTING.md

@@ -43,7 +43,9 @@ GitHub provides additional documentation on [forking a repository](https://help.
 
 
 ## Licensing
-Any contribution that you make to this repository will be under the Apache 2 License, as dictated by that [license]:
+Any contribution that you make to this repository will
+be under the Apache 2 License, as dictated by that
+[license](http://www.apache.org/licenses/LICENSE-2.0.html):
 
 ~~~
 5. Submission of Contributions. Unless You explicitly state otherwise,

LICENSE

@@ -187,7 +187,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2021 PickNik, 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.