Bump serial_test in the cargo group across 1 directory

Bumps the cargo group with 1 update in the / directory: [serial_test](https://github.com/palfrey/serial_test).


Updates `serial_test` from 3.5.0 to 4.0.1
- [Release notes](https://github.com/palfrey/serial_test/releases)
- [Commits](palfrey/serial_test@v3.5.0...v4.0.1)

---
updated-dependencies:
- dependency-name: serial_test
  dependency-version: 4.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: cargo
...

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

Author: dependabot[bot]

Cargo.lock

@@ -75,7 +75,7 @@ gag = "1.0.0"
 [dev-dependencies]
 rstest = "0.26.1"
 serde_test = "1.0.177"
-serial_test = { version = "3.5.0", default-features = false }
+serial_test = { version = "4.0.1", default-features = false }
 
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