ports-mgmt/pkg: update to 1.18.1

Fix a crash in pkg create [1]
Fix a plist issue [2]

PR:		264841 [1]
Reported by:	many [2], Simeon Simeonov <sgs@pichove.org> [1]

ports-mgmt/pkg/Makefile

 PORTNAME=	pkg
-DISTVERSION=	1.18.0
+DISTVERSION=	1.18.1
 _PKG_VERSION=	${DISTVERSION}
 CATEGORIES=	ports-mgmt
 #MASTER_SITES=	\

ports-mgmt/pkg/distinfo

-TIMESTAMP = 1655968889
-SHA256 (freebsd-pkg-1.18.0_GH0.tar.gz) = 69fa7e536b5f86878acc4521ab6560afaa919055c6f56809986abb5740833e09
-SIZE (freebsd-pkg-1.18.0_GH0.tar.gz) = 4019915
+TIMESTAMP = 1655979526
+SHA256 (freebsd-pkg-1.18.1_GH0.tar.gz) = 54bfeb9f00d347fe6965be72ee03bf5aa3f31e9066ace0ff038e05b2004994df
+SIZE (freebsd-pkg-1.18.1_GH0.tar.gz) = 4019839

ports-mgmt/pkg/pkg-plist

 etc/bash_completion.d/_pkg.bash
 etc/periodic/daily/411.pkg-backup
 etc/periodic/daily/490.status-pkg-changes
+etc/periodic/security/405.pkg-base-audit
 etc/periodic/security/410.pkg-audit
 etc/periodic/security/460.pkg-checksum
 etc/periodic/weekly/400.status-pkg