build(deps): bump tokio from 1.24.1 to 1.25.0 in /example/build-with-buf

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.24.1 to 1.25.0.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.24.1...tokio-1.25.0)

---
updated-dependencies:
- dependency-name: tokio
  dependency-type: indirect
...

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