Exclude app-data from UMBREL_ROOT chown

Missed from https://github.com/getumbrel/umbrel/pull/365

scripts/update/00-run.sh

@@ -30,7 +30,7 @@ EOF
 
 # Fix permissions
 echo "Fixing permissions"
-chown -R 1000:1000 "$UMBREL_ROOT"/
+find "$UMBREL_ROOT" -path "$UMBREL_ROOT/app-data" -prune -o -exec chown 1000:1000 {} +
 
 # Backup
 echo "Backing up existing directory tree"