Fix version information in backupiso script

Fixes: #12083
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

config/rootfiles/core/132/filelists/files

@@ -15,6 +15,7 @@ srv/web/ipfire/cgi-bin/routing.cgi
 srv/web/ipfire/cgi-bin/urlfilter.cgi
 srv/web/ipfire/cgi-bin/zoneconf.cgi
 usr/lib/firewall/rules.pl
+usr/local/bin/backupiso
 usr/sbin/convert-snort
 var/ipfire/ids-functions.pl
 var/ipfire/langs

src/scripts/backupiso

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 # FIXME: edit this lines before release
-IPFVER=2.21
+IPFVER=2.23
 COREVER=$(cat /opt/pakfire/db/core/mine)
 
 arch=$(uname -m)