update psutil to 6, furo to 2024, markupsafe to <3

[irisbian504]

fixes #240 , #241 , #242

[anth-volk]

Thanks for this @irisbian504!

It looks like you committed the ipython version update off of a local master branch, then opened this one in order to add the later commits. Unfortunately, this breaks two parts of our CI/CD Actions. In order to fix this, could you do the following:

1. Run git pull upstream master, then git push origin master (or in GitHub, click the button to keep your local fork up-to-date)
2. Switch to your branch, then run git rebase master. You'll probably hit a couple merge conflicts, but the changelog should only contain your most recent changes, and the version number in setup.py should be the most recent one, 3.11.1.