chore(deps): update grafana/grafana docker tag to v13.2.2 (#2470)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [grafana/grafana](https://redirect.github.com/grafana/grafana) | patch
| `13.2.1` → `13.2.2` |

---

### Release Notes

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

###
[`v13.2.2`](https://redirect.github.com/grafana/grafana/releases/tag/v13.2.2):
13.2.2

[Download page](https://grafana.com/grafana/download/13.2.2)
[What's new
highlights](https://grafana.com/docs/grafana/latest/whatsnew/)

##### Security

- Security: Fix CVE-2026-15815
- Security: Fix CVE-2026-76154
- Security: Fix CVE-2026-79656

##### Bug fixes

- **Dashboards:** Preserve query variable refresh setting on v2
dashboard import
[#&#8203;132089](https://redirect.github.com/grafana/grafana/pull/132089),
[@&#8203;grafana-writer\[bot\]](https://redirect.github.com/grafana-writer\[bot])
- **Provisioning:** Fix folder rename UID collision during full sync
[#&#8203;132157](https://redirect.github.com/grafana/grafana/pull/132157),
[@&#8203;grafana-writer\[bot\]](https://redirect.github.com/grafana-writer\[bot])

</details>

---

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examples/example-custom-buckets/docker-compose.yaml

@@ -18,7 +18,7 @@ services:
       - --enable-feature=native-histograms
       - --config.file=/prometheus.yml
   grafana:
-    image: grafana/grafana:13.2.1@sha256:f772d434e8fab0049deb2b1b30abd43342bcfca1537614aa8d36080232cf4283
+    image: grafana/grafana:13.2.2@sha256:ac461fb352abc50da10a51c7d02462e9c05488f11f53f14b3ad79a8145f638a0
     network_mode: host
     volumes:
       - ./docker-compose/grafana-datasources.yaml:/etc/grafana/provisioning/datasources/grafana-datasources.yaml

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

@@ -59,7 +59,7 @@ services:
     command:
       - --config.file=/config.yaml
   grafana:
-    image: grafana/grafana:13.2.1@sha256:f772d434e8fab0049deb2b1b30abd43342bcfca1537614aa8d36080232cf4283
+    image: grafana/grafana:13.2.2@sha256:ac461fb352abc50da10a51c7d02462e9c05488f11f53f14b3ad79a8145f638a0
     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:13.2.1@sha256:f772d434e8fab0049deb2b1b30abd43342bcfca1537614aa8d36080232cf4283
+    image: grafana/grafana:13.2.2@sha256:ac461fb352abc50da10a51c7d02462e9c05488f11f53f14b3ad79a8145f638a0
     network_mode: host
     volumes:
       - ./docker-compose/grafana-datasources.yaml:/etc/grafana/provisioning/datasources/grafana-datasources.yaml