Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.37 to 1.0.38. - [Release notes](https://github.com/serde-rs/json/releases) - [Commits](https://github.com/serde-rs/json/compare/v1.0.37...v1.0.38) Signed-off-by: dependabot[bot] <support@dependabot.com>