chore(deps): update helm charts docker tags

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
grafana/grafana	minor	9.0.7 -> 9.1.0
kube-prometheus-stack	minor	39.6.0 -> 39.8.0
opentelemetry-operator (source)	patch	0.11.5 -> 0.11.8
quay.io/prometheus/prometheus	minor	v2.37.0 -> v2.38.0

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Release Notes

prometheus-community/helm-charts

### [`v39.8.0`](https://togithub.com/prometheus-community/helm-charts/releases/tag/kube-prometheus-stack-39.8.0) [Compare Source](https://togithub.com/prometheus-community/helm-charts/compare/kube-prometheus-stack-39.7.0...kube-prometheus-stack-39.8.0) 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. ### [`v39.7.0`](https://togithub.com/prometheus-community/helm-charts/releases/tag/kube-prometheus-stack-39.7.0) [Compare Source](https://togithub.com/prometheus-community/helm-charts/compare/kube-prometheus-stack-39.6.0...kube-prometheus-stack-39.7.0) 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.

open-telemetry/opentelemetry-helm-charts

### [`v0.11.8`](https://togithub.com/open-telemetry/opentelemetry-helm-charts/releases/tag/opentelemetry-operator-0.11.8) [Compare Source](https://togithub.com/open-telemetry/opentelemetry-helm-charts/compare/opentelemetry-operator-0.11.7...opentelemetry-operator-0.11.8) OpenTelemetry Operator Helm chart for Kubernetes ### [`v0.11.7`](https://togithub.com/open-telemetry/opentelemetry-helm-charts/releases/tag/opentelemetry-operator-0.11.7) [Compare Source](https://togithub.com/open-telemetry/opentelemetry-helm-charts/compare/opentelemetry-operator-0.11.6...opentelemetry-operator-0.11.7) OpenTelemetry Operator Helm chart for Kubernetes ### [`v0.11.6`](https://togithub.com/open-telemetry/opentelemetry-helm-charts/releases/tag/opentelemetry-operator-0.11.6) [Compare Source](https://togithub.com/open-telemetry/opentelemetry-helm-charts/compare/opentelemetry-operator-0.11.5...opentelemetry-operator-0.11.6) OpenTelemetry Operator Helm chart for Kubernetes

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