Add Python 3.12-dev to tests actions

[luabud]

We should add Python 3.12-dev here and see if all tests pass: https://github.com/microsoft/vscode-isort/blob/main/.github/workflows/pr-check.yml

[pheonix-18]

Can I take this issue @luabud

[eleanorjboyd]

@karthiknadig, this addition failed on the python repo- do we anticipate it will work on this repo?
--Edit: Yes

[pheonix-18]

Made PR: #330