devel/rubygem-aws-sdk-synthetics: Update to 1.39.0

Changes:	https://github.com/aws/aws-sdk-ruby/blob/version-3/gems/aws-sdk-synthetics/CHANGELOG.md

devel/rubygem-aws-sdk-synthetics/Makefile

 PORTNAME=	aws-sdk-synthetics
-PORTVERSION=	1.38.0
+PORTVERSION=	1.39.0
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 

devel/rubygem-aws-sdk-synthetics/distinfo

-TIMESTAMP = 1700760576
-SHA256 (rubygem/aws-sdk-synthetics-1.38.0.gem) = 7b8219610a2c1d7b30bf128ef2cc5ee7f15fff98091b47794fafa1375421e2ac
-SIZE (rubygem/aws-sdk-synthetics-1.38.0.gem) = 41472
+TIMESTAMP = 1701364424
+SHA256 (rubygem/aws-sdk-synthetics-1.39.0.gem) = 521a44a43d3d91c7657ec2b1f5ef66a599b183c870c0f4714091b44d10f2cf17
+SIZE (rubygem/aws-sdk-synthetics-1.39.0.gem) = 41472