Bump tokio from 1.37.0 to 1.38.2 in /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] <support@github.com>

Author: dependabot[bot]

rust/Cargo.lock

@@ -9,7 +9,7 @@ harness = false
 
 [dependencies]
 postgres = { version = "0.19.5" }
-tokio = { version = "1.29.1", features = ["full"] }
+tokio = { version = "1.38.2", features = ["full"] }
 doublets = { git = "https://github.com/linksplatform/doublets-rs.git" }
 
 [dev-dependencies]