Upgrade to Grafana 10.3.1

Micro update of container without any issue by means of Docker compose YAML infrastructure and automated Portainer GitOps workflow mitigating a cirtical CVE.

Also upgrading Grafana instances of Loki and kube-prometheus-stack on K3s cluster.

10.3.0 (2024-01-22)
10.3.1 (2024-01-22)