www/rubygem-ruby-openai: Update to 7.2.0

Changes:	https://github.com/alexrudall/ruby-openai/releases

www/rubygem-ruby-openai/Makefile

 PORTNAME=	ruby-openai
-PORTVERSION=	7.1.0
+PORTVERSION=	7.2.0
 CATEGORIES=	www rubygems
 MASTER_SITES=	RG
 

www/rubygem-ruby-openai/distinfo

-TIMESTAMP = 1718580336
-SHA256 (rubygem/ruby-openai-7.1.0.gem) = 2abe612149be850f05f53013b7335a2c1259edff5eeaea8ca439b11cb63bb0c8
-SIZE (rubygem/ruby-openai-7.1.0.gem) = 34304
+TIMESTAMP = 1728632754
+SHA256 (rubygem/ruby-openai-7.2.0.gem) = 19fae89cb4d38671360cd6e9aa7ab867bb970f9e64d8a5146460d410d18e5958
+SIZE (rubygem/ruby-openai-7.2.0.gem) = 34816