build(deps): bump pyo3-build-config in /examples/hello-world

Bumps [pyo3-build-config](https://github.com/pyo3/pyo3) from 0.19.2 to 0.20.0.
- [Release notes](https://github.com/pyo3/pyo3/releases)
- [Changelog](https://github.com/PyO3/pyo3/blob/main/CHANGELOG.md)
- [Commits](PyO3/pyo3@v0.19.2...v0.20.0)

---
updated-dependencies:
- dependency-name: pyo3-build-config
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

examples/hello-world/Cargo.lock

@@ -23,4 +23,4 @@ name = "print-hello"
 path = "rust/print_hello.rs"
 
 [build-dependencies]
-pyo3-build-config = "0.19.2"
+pyo3-build-config = "0.20.0"