The u-boot-tools package was typoed

Should fix the ubuntu-preinstalled impish build

live-build/auto/config

@@ -916,7 +916,7 @@ case "$ARCH+${SUBARCH:-}" in
 		COMPONENTS='main restricted universe multiverse'
 		# Most Pi-specific package installation is handled via the seeds in the
 		# per-project/subproject cases above
-		add_package install linux-firmware-raspi2 pi-bluetooth u-boot-rpi u-boot-tool
+		add_package install linux-firmware-raspi2 pi-bluetooth u-boot-rpi u-boot-tools
 		BINARY_REMOVE_LINUX=false
 		;;
 esac