devel/rubygem-io-event: Update to 1.7.3

Changes:	https://github.com/socketry/io-event/releases
		https://github.com/socketry/io-event/commits/main

devel/rubygem-io-event/Makefile

 PORTNAME=	io-event
-PORTVERSION=	1.7.2
+PORTVERSION=	1.7.3
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 

devel/rubygem-io-event/distinfo

-TIMESTAMP = 1729594508
-SHA256 (rubygem/io-event-1.7.2.gem) = 834122f412132d5ec3bf05ba9c3d25472b440c989acf485403d8a13b5a9aa8e5
-SIZE (rubygem/io-event-1.7.2.gem) = 43008
+TIMESTAMP = 1729910020
+SHA256 (rubygem/io-event-1.7.3.gem) = e2ba90de5321fc5313898f72c01f50129b71474a7f7d2cef914b4f7bdb692cb2
+SIZE (rubygem/io-event-1.7.3.gem) = 43008