devel/py-factory-boy: Replace reference to PY_PILLOW with its value

Since this port doesn't work with Python 2.7, the value of PY_PILLOW
doesn't change. So replace reference to it with its value.

PR:		269401
Approved by:	maintainer

devel/py-factory-boy/Makefile

@@ -13,7 +13,7 @@ LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}Faker>=0:devel/py-Faker@${PY_FLAVOR}
-TEST_DEPENDS=	${PY_PILLOW} \
+TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pillow>=7.0.0:graphics/py-pillow@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}coverage>=0:devel/py-coverage@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}dateutil>=0:devel/py-dateutil@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}django32>=0:www/py-django32@${PY_FLAVOR} \