[dark mode] Tables have light background and low contrast

[choldgraf]

The API documentation page has tables with a light and low-contrast background in dark-mode. For example:

From this page:

https://pydata-sphinx-theme.readthedocs.io/en/latest/examples/kitchen-sink/api.html

[casperdcl]

Yes was working fine in v0.14.1 but broke in v0.14.2

[12rambau]

As 0.14.2 allowed us to make a jump from Sphinx 5 to Sphinx 7 I guess we missed some class updates ;-)

[krassowski]

This affects all tables, not only API tables, for example:

It indeed worked fine in 0.14.1 and broke in 0.14.2.