build(deps): bump tower-service from 0.3.0 to 0.3.1
Bumps [tower-service](https://github.com/tower-rs/tower) from 0.3.0 to 0.3.1.
- [Release notes](https://github.com/tower-rs/tower/releases)
- [Commits](https://github.com/tower-rs/tower/compare/tower-0.3.0...tower-0.3.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>