chore: bump serial_test from 0.4.0 to 0.5.1 (#17705)

Bumps [serial_test](https://github.com/palfrey/serial_test) from 0.4.0 to 0.5.1.
- [Release notes](https://github.com/palfrey/serial_test/releases)
- [Commits](https://github.com/palfrey/serial_test/compare/v0.4.0...v0.5.1)

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

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

gossip/Cargo.toml

@@ -46,7 +46,7 @@ thiserror = "1.0"
 [dev-dependencies]
 matches = "0.1.6"
 num_cpus = "1.13.0"
-serial_test = "0.4.0"
+serial_test = "0.5.1"
 
 [build-dependencies]
 rustc_version = "0.2"