Upgrade to Grafana 9.4.7

Minor 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.
9.4.0 (2023-02-28)
9.4.2 (2023-03-02)
9.4.3 (2023-03-02)
9.4.7 (2023-03-16)