Update documentation for python versions <=3.10 (or multiple versions)

When testing how to install the dev utilities, I noticed that my WSL Ubuntu came with python3.8 which resulted in an error.
venv does not support installing of different python versions, this needs virtualenv.

Should we include a section about how to handle this for distributions that come with python versions <= 3.10 ?
This might be too much for the simple readme, but we should maybe include this in a more detailed chapter within the documentation.
We can link the documentation in the readme to handle a corresponding error.