[FIX] point_of_sale: Fix issue for IoT upgrade

When we want to upgrade the IoT box to the lastest version
we need install kpartx to the third partition.
However the source are not up to date and we can't fetch
the package.

So we must update this partition before fetch the package

closes odoo/odoo#60591

Signed-off-by: pimodoo <pimodoo@users.noreply.github.com>

addons/point_of_sale/tools/posbox/configuration/upgrade.sh

@@ -108,6 +108,7 @@ copy_raspbian () {
     mkdir -v raspbian
     mount -v "${PART_RASPBIAN_ROOT}" raspbian
     resize2fs "${PART_RASPBIAN_ROOT}"
+    chroot raspbian/ /bin/bash -c "sudo apt-get -y update"
     chroot raspbian/ /bin/bash -c "sudo apt-get -y install kpartx"
     PATH_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
     cp -v "${PATH_DIR}"/upgrade.sh raspbian/home/pi/