New review comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/38517#discussion_r939744499

Comment:
The COPYING file must be copied verbatim from GNU, it's the requirement from GNU.
```

		    GNU GENERAL PUBLIC LICENSE
		       Version 2, June 1991

 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
     51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.
```

Part 2 of Clause 9 says 
```
If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation.
```
So, when source code doesn't mention "later version", it means that only version.