build(deps): bump kubernetes-client.version from 6.8.1 to 6.9.0

Bumps `kubernetes-client.version` from 6.8.1 to 6.9.0.

Updates `io.fabric8:kubernetes-client` from 6.8.1 to 6.9.0
- [Release notes](https://github.com/fabric8io/kubernetes-client/releases)
- [Changelog](https://github.com/fabric8io/kubernetes-client/blob/main/CHANGELOG.md)
- [Commits](fabric8io/kubernetes-client@v6.8.1...v6.9.0)

Updates `io.fabric8:knative-client` from 6.8.1 to 6.9.0

Updates `io.fabric8:kubernetes-server-mock` from 6.8.1 to 6.9.0

---
updated-dependencies:
- dependency-name: io.fabric8:kubernetes-client
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.fabric8:knative-client
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.fabric8:kubernetes-server-mock
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -45,7 +45,7 @@
         <!-- override the testcontainers version with the newest one -->
         <version.testcontainers>1.19.0</version.testcontainers>
 
-        <kubernetes-client.version>6.8.1</kubernetes-client.version>
+        <kubernetes-client.version>6.9.0</kubernetes-client.version>
         <!-- we cannot update to 2.x as jboss-logging does not support SLF4J 2 for now -->
         <version.slf4j>2.0.9</version.slf4j>
         <version.mockito>5.2.0</version.mockito>