devel/py-python-akismet: Use PORTVERSION instead of DISTVERSION

CI: yes

devel/py-python-akismet/Makefile

@@ -1,7 +1,7 @@
 # $FreeBSD$
 
 PORTNAME=	python-akismet
-DISTVERSION=	0.4.2
+PORTVERSION=	0.4.2
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}