build(deps): update k8s-openapi requirement from 0.20 to 0.22

Updates the requirements on [k8s-openapi](https://github.com/Arnavion/k8s-openapi) to permit the latest version.
- [Release notes](https://github.com/Arnavion/k8s-openapi/releases)
- [Changelog](https://github.com/Arnavion/k8s-openapi/blob/master/CHANGELOG.md)
- [Commits](Arnavion/k8s-openapi@v0.20.0...v0.22.0)

---
updated-dependencies:
- dependency-name: k8s-openapi
  dependency-type: direct:production
...

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

examples/Cargo.toml

@@ -42,7 +42,7 @@ default-features = false
 features = ["derive", "help", "env", "std"]
 
 [dev-dependencies.k8s-openapi]
-version = "0.20"
+version = "0.22"
 default-features = false
 features = ["latest"]
 

kubert/Cargo.toml

@@ -186,7 +186,7 @@ features = ["derive", "std"]
 # Not used directly, but required to ensure that the k8s-openapi dependency is considered part of
 # the "deps" graph rather than just the "dev-deps" graph
 [dependencies.k8s-openapi]
-version = "0.20"
+version = "0.22"
 optional = true
 default-features = false