build(deps): update jsonschema requirement from 0.20.0 to 0.21.0 (#325)

Updates the requirements on [jsonschema](https://github.com/Stranger6667/jsonschema-rs) to permit the latest version.
- [Release notes](https://github.com/Stranger6667/jsonschema-rs/releases)
- [Changelog](https://github.com/Stranger6667/jsonschema-rs/blob/master/CHANGELOG.md)
- [Commits](Stranger6667/jsonschema@rust-v0.20.0...rust-v0.21.0)

---
updated-dependencies:
- dependency-name: jsonschema
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.toml

@@ -120,7 +120,7 @@ semver = {version = "1.0.20", optional = true, default-features = false }
 wax = { version = "0.6.0", features = [], default-features = false, optional = true }
 url = { version = "2.5.0", optional = true }
 uuid = { version = "1.6.1", default-features = false, features = ["v4", "fast-rng"], optional = true }
-jsonschema = { version = "0.20.0", default-features = false, optional = true }
+jsonschema = { version = "0.21.0", default-features = false, optional = true }
 chrono = { version = "0.4.31", optional = true }
 chrono-tz = { version = "0.10.0", optional = true }
 jsonwebtoken = { version = "9.2.0", optional = true }