devel/rubygem-pkg-config: Update to 1.4.6

Changes:	https://github.com/ruby-gnome/pkg-config/blob/master/NEWS
		https://github.com/ruby-gnome/pkg-config/commits/master

devel/rubygem-pkg-config/Makefile

 # Created by: Steve Wills <swills@FreeBSD.org>
 
 PORTNAME=	pkg-config
-PORTVERSION=	1.4.5
+PORTVERSION=	1.4.6
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 

devel/rubygem-pkg-config/distinfo

-TIMESTAMP = 1613478593
-SHA256 (rubygem/pkg-config-1.4.5.gem) = 2af84f1a232fbb52507871434458770880adf6cd5add0ecb7961c7a59026aaeb
-SIZE (rubygem/pkg-config-1.4.5.gem) = 22016
+TIMESTAMP = 1619198883
+SHA256 (rubygem/pkg-config-1.4.6.gem) = 54be9117d55d9eba2ca5eb990548b539afc958be5b77e7a6fdc4e49e5ff052d6
+SIZE (rubygem/pkg-config-1.4.6.gem) = 22528