print/py-pycups: Update to 2.0.4

- Add GitHub to MASTER_SITES

Changes:	https://github.com/OpenPrinting/pycups/releases

print/py-pycups/Makefile

 PORTNAME=	pycups
-PORTVERSION=	2.0.2
+PORTVERSION=	2.0.4
 CATEGORIES=	print python
-MASTER_SITES=	PYPI
+MASTER_SITES=	PYPI \
+		https://github.com/OpenPrinting/pycups/releases/download/v${PORTVERSION}/
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	sunpoet@FreeBSD.org

print/py-pycups/distinfo

-TIMESTAMP = 1713528548
-SHA256 (pycups-2.0.2.tar.gz) = d0aac38fe2b558dfab2292b0af382c8aaab301571a26080ab3988d444c977d22
-SIZE (pycups-2.0.2.tar.gz) = 65061
+TIMESTAMP = 1713624714
+SHA256 (pycups-2.0.4.tar.gz) = 843e385c1dbf694996ca84ef02a7f30c28376035588f5fbeacd6bae005cf7c8d
+SIZE (pycups-2.0.4.tar.gz) = 65105