Update Helm release gateway to v1.23.3

Author: renovate[bot]

apps/istio-ingress/base/kustomization.yaml

@@ -4,7 +4,7 @@ namespace: istio-ingress
 helmCharts:
   - name: gateway
     releaseName: gateway
-    version: 1.22.0
+    version: 1.23.3
     repo: https://istio-release.storage.googleapis.com/charts
     valuesInline:
       name: istio-ingressgateway
@@ -26,7 +26,7 @@ helmCharts:
         externalTrafficPolicy: Local
   - name: gateway
     releaseName: gateway-private
-    version: 1.22.0
+    version: 1.23.3
     repo: https://istio-release.storage.googleapis.com/charts
     valuesInline:
       name: istio-ingressgateway-private