The SPDX license identifier in pyproject.toml is currently MIT AND Python-2.0, but LICENSE.PSF actually looks more like PSF-2.0 than Python-2.0, so I suspect this string should be MIT AND PSF-2.0.
This difference might seem minor, but PSF-2.0 is GPL-compatible and Python-2.0 isn't, so it might break some CI license checks. Would be good if a contributor could confirm!
P.S. thanks for adding this field - I was just coming to open an issue to request it be added.