KlipperScreen requries Python >=3.8

[kompumaster]

Hi!

KlipperScreen requries Python >=3.8, but following this manual we got 3.7 version, so it can not be installed.
If we modify script disabling version check - it will be installed, but got "no module gi" on start of KS.

fix it by using "bullseye" distrib version, and

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install python3

before runing kiauh.sh. It installs Python 3.9

Also - you need:

sudo apt-get install libsystemd-dev

or we can't install "sdbus"