devel/rubygem-aws-sdk-elasticache: Update to 1.91.0

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

devel/rubygem-aws-sdk-elasticache/Makefile

 PORTNAME=	aws-sdk-elasticache
-PORTVERSION=	1.90.0
+PORTVERSION=	1.91.0
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 

devel/rubygem-aws-sdk-elasticache/distinfo

-TIMESTAMP = 1689399147
-SHA256 (rubygem/aws-sdk-elasticache-1.90.0.gem) = d639f3173bc49ee16aea1be43dc2d37c9b765e10c2e21a8a773e5a18e9f175ca
-SIZE (rubygem/aws-sdk-elasticache-1.90.0.gem) = 145920
+TIMESTAMP = 1692211877
+SHA256 (rubygem/aws-sdk-elasticache-1.91.0.gem) = 0d08564001519fad64e8a7e97ebad06aa3373541a7418640ded2d2449adc8409
+SIZE (rubygem/aws-sdk-elasticache-1.91.0.gem) = 146432