Update pythonize requirement from 0.21 to 0.22

Updates the requirements on [pythonize](https://github.com/davidhewitt/pythonize) to permit the latest version.
- [Release notes](https://github.com/davidhewitt/pythonize/releases)
- [Changelog](https://github.com/davidhewitt/pythonize/blob/main/CHANGELOG.md)
- [Commits](davidhewitt/pythonize@v0.21.0...v0.21.1)

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

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

Cargo.toml

@@ -73,7 +73,7 @@ num = "0.4.0"
 enum-iterator = "2.0.0"
 getrandom = { version = "0.2", features = ["js"] }
 typed-builder = "0.19.1"
-pythonize = { version = "0.21", optional = true }
+pythonize = { version = "0.22", optional = true }
 snafu = { version = "0.8.3", features = ["backtrace"] }
 serde_dhall = "0.12"
 toml = "0.8.14"