Grafana 'Eth docker logs' dashboard broken on latest loki update

[vutang50]

Problem:

Ran ethd update this morning and the Grafana Eth Docker Logs failed to populate.

$ ethd logs loki
loki-1  | failed parsing config: /etc/loki/loki.yml: yaml: unmarshal errors:
loki-1  |   line 21: field shared_store not found in type compactor.Config. Use `-config.expand-env=true` flag if you want to expand environment variables in your config file

Looks like grafana/loki released 3.0 on April 8. I reverted version in grafana.yml:145 and it seems to be working again.
image: grafana/loki:2.8.11

There is a loki upgrade guide which states "The shared_store config is removed"

[yorickdowne]

Thank you. This has been fixed. Loki will switch to the v13 schema on may 1st, and after that I can push another change for Loki 3