net/py-python-heatclient: Update to 3.1.0

Changes:	https://docs.openstack.org/releasenotes/python-heatclient/

net/py-python-heatclient/Makefile

 PORTNAME=	python-heatclient
-PORTVERSION=	3.0.0
+PORTVERSION=	3.1.0
 CATEGORIES=	net python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}

net/py-python-heatclient/distinfo

-TIMESTAMP = 1658151389
-SHA256 (python-heatclient-3.0.0.tar.gz) = e4e2f2b0a6ccd866e3313f25b215832ccb6a3ab1ead838615af6f0d68341359b
-SIZE (python-heatclient-3.0.0.tar.gz) = 178097
+TIMESTAMP = 1662280650
+SHA256 (python-heatclient-3.1.0.tar.gz) = fd25bc8518f9f3c37efb80aecfb7a56d4d2a3befb82619b5bdad3af499cd999a
+SIZE (python-heatclient-3.1.0.tar.gz) = 178095