build(deps): bump syn from 1.0.31 to 1.0.38
Bumps [syn](https://github.com/dtolnay/syn) from 1.0.31 to 1.0.38. - [Release notes](https://github.com/dtolnay/syn/releases) - [Commits](dtolnay/syn@1.0.31...1.0.38) Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
