chore(deps): Update pyo3 requirement from 0.20.2 to 0.21.0

Updates the requirements on [pyo3](https://github.com/pyo3/pyo3) to permit the latest version.
- [Release notes](https://github.com/pyo3/pyo3/releases)
- [Changelog](https://github.com/PyO3/pyo3/blob/main/CHANGELOG.md)
- [Commits](PyO3/pyo3@v0.20.2...v0.20.3)

---
updated-dependencies:
- dependency-name: pyo3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -41,7 +41,7 @@ float-cmp = "0.9.0"
 ndarray = "0.15.3"
 polars = { version = "0.38.1", features = ["lazy", "rows", "ndarray"] }
 pyo3-polars = "0.12.0"
-pyo3 = { version = "0.20.2", default-features = false }
+pyo3 = { version = "0.21.0", default-features = false }
 pyo3-log = "0.9.0"
 tracing = { version = "0.1", features = ["log"] }
 csv = "1.1"