Update launch.py

please downgrade (or upgrade) to the latest version of 3.10 Python

and delete current Python and "venv" folder in WebUI's directory.

You can download 3.10 Python from here: https://www.python.org/downloads/release/python-3109/

You can download 3.10 Python from here: https://www.python.org/downloads/release/python-3106/

{"Alternatively, use a binary release of WebUI: https://github.com/AUTOMATIC1111/stable-diffusion-webui/releases" if is_windows else ""}