build(deps): bump tokio-serde from 0.8.0 to 0.9.0

Bumps [tokio-serde](https://github.com/carllerche/tokio-serde) from 0.8.0 to 0.9.0.
- [Commits](https://github.com/carllerche/tokio-serde/commits)

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

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

Author: dependabot[bot]

Cargo.lock

@@ -96,7 +96,7 @@ tokio = { version = "1", features = [
   "process",
   "macros",
 ] }
-tokio-serde = "0.8"
+tokio-serde = "0.9"
 tokio-util = { version = "0.7", features = ["codec", "io"] }
 toml = "0.8"
 tower = "0.4"