Upgrade kube-prometheus-stack to chart version 56.20.1 and app version 0.71.2

No problems deploying Prometheus Helm chart to Proxmox VE K3s Kubernetes cluster via Helm Chart and Flux V2 reconciliation in a GitOps approach.

0.71.2 / 2024-01-25
Helm Chart 56.14.0
Helm Chart 56.15.0
Helm Chart 56.16.0
Helm Chart 56.17.0
Helm Chart 56.18.0
Helm Chart 56.19.0
Helm Chart 56.20.0
Helm Chart 56.20.1