chore(deps): update helm release kube-prometheus-stack to v50.3.1 (#73)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [kube-prometheus-stack](https://github.com/prometheus-operator/kube-prometheus) ([source](https://github.com/prometheus-community/helm-charts)) | minor | `50.2.0` -> `50.3.1` |

---

### Release Notes

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

### [`v50.3.1`](https://github.com/prometheus-community/helm-charts/releases/tag/kube-prometheus-stack-50.3.1)

[Compare Source](prometheus-community/helm-charts@kube-prometheus-stack-50.3.0...kube-prometheus-stack-50.3.1)

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] fix thanos sidecar ingress by [@&#8203;DrFaust92](https://github.com/DrFaust92) in prometheus-community/helm-charts#3756

**Full Changelog**: prometheus-community/helm-charts@prometheus-24.2.0...kube-prometheus-stack-50.3.1

### [`v50.3.0`](https://github.com/prometheus-community/helm-charts/releases/tag/kube-prometheus-stack-50.3.0)

[Compare Source](prometheus-community/helm-charts@kube-prometheus-stack-50.2.0...kube-prometheus-stack-50.3.0)

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] regenerate grafana dashboards by [@&#8203;DrFaust92](https://github.com/DrFaust92) in prometheus-community/helm-charts#3757

**Full Changelog**: prometheus-community/helm-charts@kube-prometheus-stack-50.2.0...kube-prometheus-stack-50.3.0

</details>

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Reviewed-on: https://git.home/nrdufour/home-ops/pulls/73
Co-authored-by: Renovate <renovate@ptinem.io>
Co-committed-by: Renovate <renovate@ptinem.io>

kubernetes/main/apps/monitoring/kube-prometheus-stack/app/helm-release.yaml

@@ -9,7 +9,7 @@ spec:
   chart:
     spec:
       chart: kube-prometheus-stack
-      version: 50.2.0
+      version: 50.3.1
       sourceRef:
         kind: HelmRepository
         name: prometheus-community-charts