Docs: Fix broken link for the Grafana on RHEL or Ubuntu tutorial (#18697)
Docs: Fix broken link for the Grafana on RHEL or Ubuntu tutorial (#18697)

The author updated their site and now the link changed.
grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana