docs: point to latest release for docker installation (#3235)
docs: point to latest release for docker installation (#3235)

Signed-off-by: Andreas Plesner <56feb3ee1255513aa767f67c04e0980ef8abb7e0@mutt.dk>
grafana/loki,grafana/loki,grafana/loki,grafana/loki,grafana/loki,grafana/loki