Bump rust-polars to unreleased 2023-12-25

[etiennebacher]

Related to #616

[etiennebacher]

@eitsupi I'm stuck on the failures of release-lib workflows. I tried bumping the version of the r-polars crate but no success. Maybe the only thing to do is to bump the rust version in cargo.toml?

[eitsupi]

I'm stuck on the failures of release-lib workflows. I tried bumping the version of the r-polars crate but no success. Maybe the only thing to do is to bump the rust version in cargo.toml?

lib 0.35.1 has not been released, so no version change is required.
I think the build failure is not a problem with our Rust source code, but with the toolchain, since it is only happening at nightly and is failing to build polars-arrow in the dependent crate, not r-polars.

[etiennebacher]

Thanks for the fix @eitsupi