powdertoy license change

[Artur Frenszek-Iwicki]

Hi all,

I've recently updated powdertoy [0], the physics sandbox game, 
to v100.0.399. [1]

The package license has been changed from:
  GPL-3.0-only AND Apache-2.0 AND MIT
to:
  GPL-3.0-only AND MIT
This is due to upstream removing some bundled third-party code
licensed under Apache-2.0 and replacing it with original code.

powdertoy is a leaf package with no dependents.

Cheers,
Artur FI

[0] https://src.fedoraproject.org/rpms/powdertoy
[1] https://github.com/The-Powder-Toy/The-Powder-Toy/releases/tag/v100.0.399