Bump tokio from 1.50.0 to 1.51.0 (#1407)

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.50.0 to 1.51.0.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.50.0...tokio-1.51.0)

---
updated-dependencies:
- dependency-name: tokio
  dependency-version: 1.51.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.lock

@@ -66,7 +66,7 @@ thiserror = "2.0.18"
 tempfile = "3.27.0"
 test-common = { path = "test-common" }
 thouart = { git = "https://github.com/oxidecomputer/thouart" }
-tokio = { version = "1.50.0", features = ["full"] }
+tokio = { version = "1.51.0", features = ["full"] }
 tokio-util = "0.7.18"
 toml = "1.0.7"
 toml_edit = "0.25.8"