Update grafana/grafana Docker tag to v12.0.2 (#1423)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [grafana/grafana](https://redirect.github.com/grafana/grafana) | patch
| `12.0.1` -> `12.0.2` |

---

> [!WARNING]
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---

### Release Notes

<details>
<summary>grafana/grafana (grafana/grafana)</summary>

###
[`v12.0.2`](https://redirect.github.com/grafana/grafana/blob/HEAD/CHANGELOG.md#1202-2025-06-17)

[Compare
Source](https://redirect.github.com/grafana/grafana/compare/v12.0.1...v12.0.2)

##### Bug fixes

-   **Security:** Fixes CVE-2025-3415

<!-- 12.0.2 END -->

<!-- 11.6.3 START -->

</details>

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examples/example-exemplars-tail-sampling/docker-compose.yaml

@@ -59,7 +59,7 @@ services:
     command:
       - --config.file=/config.yaml
   grafana:
-    image: grafana/grafana:12.0.1
+    image: grafana/grafana:12.0.2
     network_mode: host
     ports:
       - "3000:3000"

examples/example-native-histogram/docker-compose.yaml

@@ -18,7 +18,7 @@ services:
       - --enable-feature=native-histograms
       - --config.file=/prometheus.yml
   grafana:
-    image: grafana/grafana:12.0.1
+    image: grafana/grafana:12.0.2
     network_mode: host
     volumes:
       - ./docker-compose/grafana-datasources.yaml:/etc/grafana/provisioning/datasources/grafana-datasources.yaml