build(deps): bump jsonschema from 0.28.2 to 0.28.3

Bumps [jsonschema](https://github.com/Stranger6667/jsonschema) from 0.28.2 to 0.28.3.
- [Release notes](https://github.com/Stranger6667/jsonschema/releases)
- [Changelog](https://github.com/Stranger6667/jsonschema/blob/master/CHANGELOG.md)
- [Commits](Stranger6667/jsonschema@rust-v0.28.2...rust-v0.28.3)

---
updated-dependencies:
- dependency-name: jsonschema
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>