Update Rust crate pyo3 to v0.29.2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
pyo3	dependencies	patch	0.29.1 → 0.29.2

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Release Notes

pyo3/pyo3 (pyo3)

v0.29.2

Compare Source

Packaging

• Add PYO3_USE_RAW_DYLIB=0 opt-out of raw-dylib linking for Windows. #​6185

Fixed

• Fix PyO3 0.29 regression with failure to link under Cygwin / MSYS2. #​6185
• Fix stubs generation for field getters (#[pyo3(get)]) when IntoPyObject is only implemented on references of the field type. #​6276
• Fix #[classmethod] magic methods receiving the instance instead of its type when invoked through a type slot. #​6283
• Fix pyo3_build_config::add_libpython_rpath_link_args emitting Unix-style rpath linker arguments on Windows and Cygwin. #​6284
• Fix PyO3 0.29.1 regression on PyPy causing crashes when deallocating #[pyclass] instances. #​6294
• Fix missing trailing nul in Python 3.9 #[pyclass] docstrings. #​6296
• Fix reference count leak of #[classattr] values created from fn items. #​6297

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