build(deps): bump the deps group

Bumps the deps group in /examples/rust_with_cffi with 1 update: [pyo3](https://github.com/pyo3/pyo3).


Updates `pyo3` from 0.20.1 to 0.20.2
- [Release notes](https://github.com/pyo3/pyo3/releases)
- [Changelog](https://github.com/PyO3/pyo3/blob/main/CHANGELOG.md)
- [Commits](PyO3/pyo3@v0.20.1...v0.20.2)

---
updated-dependencies:
- dependency-name: pyo3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: deps
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

examples/rust_with_cffi/Cargo.lock

@@ -5,7 +5,7 @@ authors = ["Alex Gaynor <alex.gaynor@gmail.com>"]
 edition = "2018"
 
 [dependencies]
-pyo3 = { version = "0.20.1", features = ["extension-module"] }
+pyo3 = { version = "0.20.2", features = ["extension-module"] }
 
 [lib]
 name = "rust_with_cffi"