frozenset to HashSet<T>

[hauntsaninja]

PyO3's conversion guide https://pyo3.rs/v0.11.0/conversions#argument-types suggests that if I have an argument type of HashSet I should be able to pass a frozenset to it. However, when I attempt this I get TypeError: argument 'xyz': 'frozenset' object cannot be converted to 'PySet'. Am I missing something — if not, I can make a small repro and open an issue.

[davidhewitt]

With apologies this is a bug that already got fixed on main, it'll come in 0.21: #3632