Update azure/setup-kubectl action to v5

Signed-off-by: Mend Renovate <bot@renovateapp.com>

Author: renovate-bot

.github/actions/prepare-k8s/action.yaml

@@ -23,7 +23,7 @@ runs:
       uses: helm/kind-action@v1.13.0
 
     - name: Install kubectl
-      uses: azure/setup-kubectl@v4.0.1
+      uses: azure/setup-kubectl@v5.1.0
       with:
         version: 'v1.28.8'
       id: install