sysutils/smenu: Update to 0.9.18

Changelog:	https://github.com/p-gen/smenu/releases/tag/v0.9.18

sysutils/smenu/Makefile

 PORTNAME=	smenu
 DISTVERSIONPREFIX=	v
-DISTVERSION=	0.9.17
+DISTVERSION=	0.9.18
 CATEGORIES=	sysutils
 
 MAINTAINER=	dbaio@FreeBSD.org

sysutils/smenu/distinfo

-TIMESTAMP = 1612111958
-SHA256 (p-gen-smenu-v0.9.17_GH0.tar.gz) = f9d174af52d92725710dbcfe3905d511901f810849d81d3f6fc6c51c30bebc7f
-SIZE (p-gen-smenu-v0.9.17_GH0.tar.gz) = 641598
+TIMESTAMP = 1622983059
+SHA256 (p-gen-smenu-v0.9.18_GH0.tar.gz) = 08d4f58edb432522da61f94372a78c812a1fee324a31a60f432283715fa56d37
+SIZE (p-gen-smenu-v0.9.18_GH0.tar.gz) = 646275