Bump fabric8_kubernetes_version from 6.13.3 to 6.13.4 (#524)

Bumps `fabric8_kubernetes_version` from 6.13.3 to 6.13.4.

Updates `io.fabric8:kubernetes-client` from 6.13.3 to 6.13.4
- [Release notes](https://github.com/fabric8io/kubernetes-client/releases)
- [Changelog](https://github.com/fabric8io/kubernetes-client/blob/main/CHANGELOG.md)
- [Commits](fabric8io/kubernetes-client@v6.13.3...v6.13.4)

Updates `io.fabric8:kubernetes-server-mock` from 6.13.3 to 6.13.4

---
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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

dubbo-extensions-dependencies-bom/pom.xml

@@ -95,7 +95,7 @@
         <spring-boot.version>2.7.18</spring-boot.version>
 
         <!-- Fabric8 for Kubernetes -->
-        <fabric8_kubernetes_version>6.13.3</fabric8_kubernetes_version>
+        <fabric8_kubernetes_version>6.13.4</fabric8_kubernetes_version>
         <hessian_version>4.0.66</hessian_version>
         <httpclient_version>4.5.14</httpclient_version>
         <jsonrpc_version>1.2.0</jsonrpc_version>