lang/cython: Reset maintainership after 4 consecutive maintainer timeouts

Reference:	https://cgit.freebsd.org/ports/commit/lang/cython?id=534b2fb9ede41de42712d9b9dad924740b32f96f
		https://cgit.freebsd.org/ports/commit/lang/cython?id=cef148e057524a6d0c2f9ba1f865ea4ea2aa891f
		https://cgit.freebsd.org/ports/commit/lang/cython?id=4386b63681ba8ac895bd40d2975e7f8bd96253b9
		https://cgit.freebsd.org/ports/commit/lang/cython?id=7d8bc64a9975fa609f523e5f3da7340299907cea

lang/cython/Makefile

@@ -8,7 +8,7 @@ MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 DISTNAME=	Cython-${PORTVERSION}
 
-MAINTAINER=	vmagerya@gmail.com
+MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Compiler for Writing C Extensions for the Python Language
 
 LICENSE=	APACHE20