[3.12] gh-111178: Docs: fix `traverseproc`, `inquiry`, and `destructor` parameters in slot typedefs table (GH-112742) (GH-112792)

gh-111178: Docs: fix `traverseproc`, `inquiry`, and `destructor` parameters in slot typedefs table (GH-112742)

In the slot typedefs table, the parameter of `destructor`
and the first parameter of `traverseproc` should both be
`PyObject *` rather than `void *`.
Same for `inquiry`.
(cherry picked from commit 00cce0fe495ee820cd3ca5878bdbe3dd65b1be7b)

Co-authored-by: Christopher Chavez <chrischavez@gmx.us>