build(deps): update syn requirement in /test/cargo-fuzz

Updates the requirements on [syn](https://github.com/dtolnay/syn) to permit the latest version.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](dtolnay/syn@2.0.119...3.0.3)

---
updated-dependencies:
- dependency-name: syn
  dependency-version: 3.0.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -514,7 +514,7 @@ static_assertions = "1.1"
 strsim = "0.11.1"
 subtle = "2.6.1"
 supports-color = "3.0.2"
-syn = { version = "2.0.119", features = ["extra-traits", "full", "parsing", "printing"] }
+syn = { version = "3.0.3", features = ["extra-traits", "full", "parsing", "printing"] }
 sysctl = "0.7.1"
 sysinfo = "0.29.11"
 tabled = "0.21.0"