OpenSTLinux 6.2.1 repo for apt is missing X-LINUX-ISP

[mikefiala]

Repo http://packages.openstlinux.st.com/6.2.1 doesn't contain the lates X-LINUX-ISP release.

`
root@stm32mp2-e3-d3-ab:~# apt-get update

The software package is provided AS IS, and by downloading it, you agree to be bound to the terms of the software license
agreement (SLA).
The detailed content licenses can be found at https://wiki.st.com/stm32mpu/wiki/OpenSTLinux_licenses.

Get:1 http://packages.openstlinux.st.com/6.2.1 scarthgap InRelease [5726 B]
Get:2 http://packages.openstlinux.st.com/6.2.1 scarthgap/main arm64 Packages [1034 kB]
Get:3 http://packages.openstlinux.st.com/6.2.1 scarthgap/updates arm64 Packages [36.1 kB]
Get:4 http://packages.openstlinux.st.com/6.2.1 scarthgap/untested arm64 Packages [1527 kB]
Fetched 2603 kB in 3s (949 kB/s)
Reading package lists... Done

root@stm32mp2-e3-d3-ab:~# apt-cache search x-linux
installer-apps - Demos and X-Linux Expansion Packages Individual Installers and Uninstallers
installer-gtk - Demo and X-Linux Expansion Packages Installer and Uninstaller
`