Bump io.fabric8:kubernetes-client from 6.8.1 to 6.9.0 in /modules/k3s

Bumps [io.fabric8:kubernetes-client](https://github.com/fabric8io/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)

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

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

Author: dependabot[bot]

modules/k3s/build.gradle

@@ -8,7 +8,7 @@ dependencies {
     // Any >2.8 version here is not compatible with jackson-databind 2.8.x.
     shaded 'com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.8.8'
 
-    testImplementation 'io.fabric8:kubernetes-client:6.8.1'
+    testImplementation 'io.fabric8:kubernetes-client:6.9.0'
     testImplementation 'io.kubernetes:client-java:18.0.1'
     testImplementation 'org.assertj:assertj-core:3.24.2'
 }