devel/py-grpcio-tools: update to 1.50.0.

devel/py-grpcio-tools/Makefile

 PORTNAME=	grpcio-tools
-PORTVERSION=	1.49.1
+PORTVERSION=	1.50.0
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}

devel/py-grpcio-tools/distinfo

-TIMESTAMP = 1664077947
-SHA256 (grpcio-tools-1.49.1.tar.gz) = 84cc64e5b46bad43d5d7bd2fd772b656eba0366961187a847e908e2cb735db91
-SIZE (grpcio-tools-1.49.1.tar.gz) = 2252679
+TIMESTAMP = 1666238240
+SHA256 (grpcio-tools-1.50.0.tar.gz) = 88b75f2afd889c7c6939f58d76b58ab84de4723c7de882a1f8448af6632e256f
+SIZE (grpcio-tools-1.50.0.tar.gz) = 2253223