Renovate: Update External dependencies to v86.1.1 (#910)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[kube-prometheus-stack](https://redirect.github.com/prometheus-operator/kube-prometheus)
([source](https://redirect.github.com/prometheus-community/helm-charts))
| patch | `86.1.0` → `86.1.1` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the [Dependency
Dashboard](../issues/18) for more information.

---

### Release Notes

<details>
<summary>prometheus-community/helm-charts
(kube-prometheus-stack)</summary>

###
[`v86.1.1`](https://redirect.github.com/prometheus-community/helm-charts/compare/kube-prometheus-stack-86.1.0...kube-prometheus-stack-86.1.1)

</details>

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helm/dev/cortex-prometheus-operator/Chart.yaml

@@ -10,4 +10,4 @@ dependencies:
   # CRDs of the prometheus operator, such as PrometheusRule, ServiceMonitor, etc.
   - name: kube-prometheus-stack
     repository: oci://ghcr.io/prometheus-community/charts
-    version: 86.1.0
+    version: 86.1.1