Bump syn from 2.0.12 to 2.0.16

Bumps [syn](https://github.com/dtolnay/syn) from 2.0.12 to 2.0.16.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](dtolnay/syn@2.0.12...2.0.16)

---
updated-dependencies:
- dependency-name: syn
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Cargo.toml

@@ -22,5 +22,5 @@ once_cell = "1.18.0"
 nom = "7.1.1"
 pathdiff = "0.2.1"
 which = { version = "4.4.0", optional = true, default-features = false }
-syn = "2.0.12"
+syn = "2.0.16"
 quote = "1.0.26"