Bump fabric8_kubernetes_version from 6.8.0 to 6.8.1 (#12931)

Bumps `fabric8_kubernetes_version` from 6.8.0 to 6.8.1.

Updates `io.fabric8:kubernetes-client` from 6.8.0 to 6.8.1
- [Release notes](https://github.com/fabric8io/kubernetes-client/releases)
- [Changelog](https://github.com/fabric8io/kubernetes-client/blob/main/CHANGELOG.md)
- [Commits](fabric8io/kubernetes-client@v6.8.0...v6.8.1)

Updates `io.fabric8:kubernetes-server-mock` from 6.8.0 to 6.8.1

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

dubbo-dependencies-bom/pom.xml

@@ -167,7 +167,7 @@
         <eureka.version>1.10.18</eureka.version>
 
         <!-- Fabric8 for Kubernetes -->
-        <fabric8_kubernetes_version>6.8.0</fabric8_kubernetes_version>
+        <fabric8_kubernetes_version>6.8.1</fabric8_kubernetes_version>
 
         <!-- Alibaba -->
         <alibaba_spring_context_support_version>1.0.11</alibaba_spring_context_support_version>