Bump tokio (#624)

Bumps the cargo group with 1 update in the /examples/rust/actix_api directory: [tokio](https://github.com/tokio-rs/tokio).


Updates `tokio` from 1.38.1 to 1.38.2
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.38.1...tokio-1.38.2)

---
updated-dependencies:
- dependency-name: tokio
  dependency-version: 1.38.2
  dependency-type: indirect
  dependency-group: cargo
...

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