2.9.3 ISO does not get the 2.9.3 version of linuxcnc

[rodw-au]

I installed Linuxcnc from the latest ISO (2.9.3) and noticed that 2.9 pre opened when selecting Linuxcnc from the menu.
So I did

sudo apt update
sudo apt upgrade

An 2.9.3 is now installed

I think the cause is that when we install linuxcnc-uspace our sources.list pointing to the Linuxcnc repository have not been "apt updated" so the Linuxcnc version in Debian Bookworm is installed.
I think we may need to wget our deb files and install manually but there are probably other ways to resolve this.

[rodw-au]

I think I have a fix for this but it is still building.
I inserted an apt update in a hook and from the logs, it appears it has worked.

Selecting previously unselected package linuxcnc-uspace.
Preparing to unpack .../1164-linuxcnc-uspace_1%3a2.9.3_amd64.deb ...
Unpacking linuxcnc-uspace (1:2.9.3) ...

[rodw-au]

Refer Pull request #40