chore(package): update cr.simoncor.net/dockerhub/grafana/grafana-oss docker tag to v13 (#2)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [cr.simoncor.net/dockerhub/grafana/grafana-oss](https://github.com/grafana/grafana) | major | `12.4.3` → `13.0.1` |

---

### Release Notes

<details>
<summary>grafana/grafana (cr.simoncor.net/dockerhub/grafana/grafana-oss)</summary>

### [`v13.0.1`](https://github.com/grafana/grafana/blob/HEAD/CHANGELOG.md#1301security-01-2026-05-12)

[Compare Source](https://github.com/grafana/grafana/compare/v12.4.3...v13.0.1)

##### Bug fixes

- **Security**: CVE-2026-28374
- **Security**: CVE-2026-28376
- **Security**: CVE-2026-28383
- **Security**: CVE-2026-28380
- **Security**: CVE-2026-33376
- **Security**: CVE-2026-28379
- **Security**: CVE-2026-33377
- **Security**: CVE-2026-33378
- **Security**: CVE-2026-33381
- **Security**: CVE-2026-33380

<!-- 13.0.1+security-01 END -->

<!-- 12.4.3+security-02 START -->

</details>

---

### Configuration

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🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

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Reviewed-on: #2

tasks/grafana.yaml

@@ -31,7 +31,7 @@
 
     # run grafana
     name: "grafana"
-    image: "cr.simoncor.net/dockerhub/grafana/grafana-oss:12.4.3"
+    image: "cr.simoncor.net/dockerhub/grafana/grafana-oss:13.0.1"
     image_name_mismatch: "recreate"
     restart_policy: "unless-stopped"
     network_mode: "host"