Bump syn from 2.0.66 to 2.0.67 (#569)

Bumps [syn](https://github.com/dtolnay/syn) from 2.0.66 to 2.0.67.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](dtolnay/syn@2.0.66...2.0.67)

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

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

Cargo.toml

@@ -115,7 +115,7 @@ utoipa-swagger-ui = { version = "7.1.0", features = ["axum"] }
 [workspace.dependencies]
 axum = "^0.7.5"
 proc-macro2 = "1.0.86"
-syn = "2.0.66"
+syn = "2.0.67"
 
 [dev-dependencies]
 console-subscriber = "0.3.0"