Bump tokio from 1.37.0 to 1.38.2 in /protobuf/libs/rust

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.37.0 to 1.38.2.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.37.0...tokio-1.38.2)

---
updated-dependencies:
- dependency-name: tokio
  dependency-version: 1.38.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

protobuf/libs/rust/Cargo.lock

@@ -18,7 +18,7 @@ path = "src/lib.rs"
 tracing = "0.1.38"
 serde = "1.0.160"
 warp = "0.3.4"
-tokio = { version = "1.28.0", features = ["full"] }
+tokio = { version = "1.38.2", features = ["full"] }
 tokio-stream = "0.1.13"
 anyhow = "1.0.70"
 tonic = "0.13.1"