Update to python 3.9

[Andrea-98]

I installed the red discord bot with python 3.9 and it is not possible to install the dashboard with the python 3.8 version as the system present on raspberry pi (linux pi os) to create the venv environment uses the latest version 3.9 and if you try to install with this version the dashboard returns errors in the modules when you start it

[botflakes]

Any chance you found a way to get it running anyway?