Bump tokio from 1.31.0 to 1.38.2 in /ci/rust_http_server (#345)

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.31.0 to 1.38.2.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.31.0...tokio-1.38.2)

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

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Author: dependabot[bot]

ci/rust_http_server/Cargo.lock

@@ -7,6 +7,6 @@ edition = "2021"
 
 [dependencies]
 hyper = { version = "=0.14.27", features = ["full"]}
-tokio = { version = "=1.31.0", features = ["full"]}
+tokio = { version = "=1.38.2", features = ["full"]}
 
 [workspace]