Bump syn from 2.0.107 to 2.0.108

Bumps [syn](https://github.com/dtolnay/syn) from 2.0.107 to 2.0.108.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](dtolnay/syn@2.0.107...2.0.108)

---
updated-dependencies:
- dependency-name: syn
  dependency-version: 2.0.108
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Cargo.lock

@@ -27,7 +27,7 @@ authors = [
 
 [dependencies]
 quote = "1.0.41"
-syn = {version = "2.0.107", features = ["full", "extra-traits"]}
+syn = {version = "2.0.108", features = ["full", "extra-traits"]}
 proc-macro2 = "1.0.101"
 
 [lib]