Bump up integration test k8s version

Author: mvdbeek

.github/workflows/integration.yaml

@@ -64,7 +64,7 @@ jobs:
         uses: medyagh/setup-minikube@latest
         with:
           driver: none
-          kubernetes-version: '1.23.0'
+          kubernetes-version: '1.28.0'
       - name: Check pods
         run: kubectl get pods -A
       - uses: actions/checkout@v4