chore(grafana-dashboards): update dashboard prometheus ( 6 → 7 ) (#6341)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| Prometheus | major | `6` -> `7` |

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

@@ -384,7 +384,7 @@ spec:
         prometheus:
           # renovate: depName="Prometheus"
           gnetId: 19105
-          revision: 6
+          revision: 7
           datasource: Prometheus
       unifi:
         unifi-insights: