chore(grafana-dashboards): update dashboard istio wasm extension dash…

…board ( 187 → 188 ) (#5465)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| Istio Wasm Extension Dashboard | major | `187` -> `188` |

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### Configuration

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kubernetes/kyak/apps/monitoring/grafana/app/helmrelease.yaml

@@ -314,7 +314,7 @@ spec:
         istio-wasm:
           # renovate: depName="Istio Wasm Extension Dashboard"
           gnetId: 13277
-          revision: 187
+          revision: 188
           datasource: Prometheus
       flux:
         flux-cluster: