incorrect optional arguments of bulk_create

[matsui-goga]

django-stubs/db/models/query.pyi has the definition of bulk_create and its async variant.

def bulk_create(
        self,
        objs: Iterable[_T],
        batch_size: Optional[int] = ...,
        ignore_conflicts: bool = ...,
        update_conflicts: Optional[Sequence[str]] = ...,
        update_fields: Optional[Sequence[str]] = ...,
    ) -> List[_T]: ...

There are two mistakes.

1. update_conflits type should be bool
2. there is another optional argument unique_fields whose type is Optional[Sequence[str]]