Enable live app updater on production variants

All variants now follow the same update procedure as the dev flakes;
prod variants pull the RadiantWave binary, Attic repo, and manifest
from the radiantwave channel instead of radiantwave-dev.

tools/find_systems.zsh

@@ -9,7 +9,7 @@
 
 set -uo pipefail # no -e: we want to keep going past unreachable hosts
 
-SUBNET="${1:-192.168.4.0/24}"
+SUBNET="${1:-192.168.1.0/24}"
 SSH_USER="kiosk"
 SSH_OPTS=(-o BatchMode=yes -o ConnectTimeout=5 -o StrictHostKeyChecking=accept-new)