Update kubernetes requirement from <22,>=12.0.1 to >=12.0.1,<29

Updates the requirements on [kubernetes](https://github.com/kubernetes-client/python) to permit the latest version.
- [Release notes](https://github.com/kubernetes-client/python/releases)
- [Changelog](https://github.com/kubernetes-client/python/blob/master/CHANGELOG.md)
- [Commits](kubernetes-client/python@v12.0.1...v28.1.0)

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

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

requirements-kubernetes.txt

@@ -1,4 +1,4 @@
-kubernetes>=12.0.1, <22
+kubernetes>=12.0.1, <29
 # Nobody ever published stubs that support Python back to before 3.9, until
 # version 22.6.0 of the Kubernetes module. So we have to use the mismatched
 # stubs.