Bump tokio from 1.37.0 to 1.38.0

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.37.0 to 1.38.0.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.37.0...tokio-1.38.0)

---
updated-dependencies:
- dependency-name: tokio
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Cargo.toml

@@ -14,7 +14,7 @@ didkit = { version = "0.6.0", default-features = false, features = ["ed25519"] }
 dwn = { path = "crates/dwn", version = "0.0.8", default-features = false }
 serde_json = "1.0.116"
 surrealdb = { version = "1.4.2", default-features = false }
-tokio = "1.37.0"
+tokio = "1.38.0"
 tracing = "0.1.40"
 tracing-subscriber = "0.3.18"
 tracing-test = "0.2.4"