chore(flux): update image kube-prometheus-stack 75.15.0 → 75.15.1 (clustertool) (#37868)

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 | `75.15.0` -> `75.15.1` |

---

### Release Notes

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

###
[`v75.15.1`](https://redirect.github.com/prometheus-community/helm-charts/releases/tag/kube-prometheus-stack-75.15.1)

[Compare
Source](https://redirect.github.com/prometheus-community/helm-charts/compare/kube-prometheus-stack-75.15.0...kube-prometheus-stack-75.15.1)

kube-prometheus-stack collects Kubernetes manifests, Grafana dashboards,
and Prometheus rules combined with documentation and scripts to provide
easy to operate end-to-end Kubernetes cluster monitoring with Prometheus
using the Prometheus Operator.

#### What's Changed

- \[kube-prometheus-stack] Document OCI artiacts in README by
[@&#8203;lilioid](https://redirect.github.com/lilioid) in
[https://github.com/prometheus-community/helm-charts/pull/5919](https://redirect.github.com/prometheus-community/helm-charts/pull/5919)

**Full Changelog**:
https://github.com/prometheus-community/helm-charts/compare/prometheus-stackdriver-exporter-4.8.3...kube-prometheus-stack-75.15.1

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
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://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MS4yMC4wIiwidXBkYXRlZEluVmVyIjoiNDEuMjAuMCIsInRhcmdldEJyYW5jaCI6Im1hc3RlciIsImxhYmVscyI6WyJhdXRvbWVyZ2UiLCJyZW5vdmF0ZS9jb250YWluZXIiLCJ0eXBlL3BhdGNoIl19-->

clustertool/embed/generic/kubernetes/system/kube-prometheus-stack/app/helm-release.yaml

@@ -10,7 +10,7 @@ spec:
   chart:
     spec:
       chart: kube-prometheus-stack
-      version: 75.15.0
+      version: 75.15.1
       sourceRef:
         kind: HelmRepository
         name: prometheus-community