duiadns: use touch to update timefile in runit service

When on an NFS volume, the shell redirection `: > $TIMEFILE` seems to
short-circuit the empty write when the file is already empty, so the
mtime is never updated. Using `touch` yields expected behavior.

srcpkgs/duiadns/files/duiadns/run

@@ -16,7 +16,7 @@ if command -v snooze >/dev/null 2>&1; then
 
 	exec chpst -u _duiadns:_duiadns \
 		snooze ${PERIOD} -t "${TIMEFILE}" \
-			sh -c "/usr/bin/duiadns '${CONFIG}'; : > '${TIMEFILE}'"
+			sh -c "/usr/bin/duiadns '${CONFIG}'; touch '${TIMEFILE}'"
 else
 	# Fall back to dumb sleep if snooze is not available
 	# PERIOD is just the number of seconds to sleep in this context

srcpkgs/duiadns/template

@@ -1,7 +1,7 @@
 # Template file for 'duiadns'
 pkgname=duiadns
 version=1.1
-revision=2
+revision=3
 build_style=python3-module
 hostmakedepends="python3-setuptools"
 depends="python3-netifaces python3-netaddr python3-requests"