www/py-google-api-core: Update to 1.31.1

Changes:	https://github.com/googleapis/python-api-core/releases
		https://github.com/googleapis/python-api-core/blob/master/CHANGELOG.md

www/py-google-api-core/Makefile

 # Created by: Po-Chuan Hsieh <sunpoet@FreeBSD.org>
 
 PORTNAME=	google-api-core
-PORTVERSION=	1.31.0
+PORTVERSION=	1.31.1
 CATEGORIES=	www python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}

www/py-google-api-core/distinfo

-TIMESTAMP = 1626281012
-SHA256 (google-api-core-1.31.0.tar.gz) = 7c8ba88e2b893ef4f67d67e229aade51a2db5053023b73b1394a5ee3dcdb561c
-SIZE (google-api-core-1.31.0.tar.gz) = 96058
+TIMESTAMP = 1628103170
+SHA256 (google-api-core-1.31.1.tar.gz) = 108cf94336aed7e614eafc53933ef02adf63b9f0fd87e8f8212acaa09eaca456
+SIZE (google-api-core-1.31.1.tar.gz) = 96056