Chore(deps): bump syn from 3.0.5 to 3.0.9 (#442)

Bumps [syn](https://github.com/dtolnay/syn) from 3.0.5 to 3.0.9.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](dtolnay/syn@3.0.5...3.0.9)

---
updated-dependencies:
- dependency-name: syn
  dependency-version: 3.0.9
  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>

Author: dependabot[bot]