x11/xsnow: update to 3.6.0 release (+)

Changelog:	https://sourceforge.net/p/xsnow/code/HEAD/tree/trunk/xsnow/ChangeLog

x11/xsnow/Makefile

 PORTNAME=	xsnow
-PORTVERSION=	3.5.3
+PORTVERSION=	3.6.0
 CATEGORIES=	x11
 MASTER_SITES=	SF/${PORTNAME}/
 

x11/xsnow/distinfo

-TIMESTAMP = 1665420845
-SHA256 (xsnow-3.5.3.tar.gz) = c3f482ae98b4685d25cafad935fddb42b01ade725c7a416b737861bae71deec1
-SIZE (xsnow-3.5.3.tar.gz) = 474540
+TIMESTAMP = 1670353830
+SHA256 (xsnow-3.6.0.tar.gz) = 715741f11dd5fd672ddc3c702e802585a31c211aac3d06612e462a6369398215
+SIZE (xsnow-3.6.0.tar.gz) = 495875