Bump serde_json from 1.0.55 to 1.0.56

Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.55 to 1.0.56.
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](serde-rs/json@v1.0.55...v1.0.56)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>