chore(deps): update container image mariadb to v13.2.0@f13cec6 by renovate (#18877)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [mariadb](https://truecharts.org/charts/dependency/mariadb)
([source](https://togithub.com/prometheus/mysqld_exporter)) | minor |
`13.0.0` -> `13.2.0` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### Configuration

📅 **Schedule**: Branch creation - "before 10pm on monday" in timezone
Europe/Amsterdam, Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

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

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://togithub.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4yMjUuMCIsInVwZGF0ZWRJblZlciI6IjM3LjIyNS4wIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIn0=-->

charts/stable/observium/Chart.yaml

@@ -17,7 +17,7 @@ dependencies:
     tags: []
     import-values: []
   - name: mariadb
-    version: 13.0.0
+    version: 13.2.0
     repository: oci://tccr.io/truecharts
     condition: mariadb.enabled
     alias: ""
@@ -42,4 +42,4 @@ sources:
   - https://github.com/truecharts/charts/tree/master/charts/stable/observium
   - https://hub.docker.com/r/pvrmza/docker-observium
 type: application
-version: 6.0.0
+version: 6.1.0