Runbooks should be located here: 

https://github.com/openshift/runbooks 

~~~

Name:

LokistackSchemaUpgradesRequired

Severity: Warning

Summary:

One or more of the deployed LokiStacks contains an outdated storage schema configuration.

Message:
The LokiStack "logging-loki" in namespace "openshift-logging" is using a storage schema configuration that does not contain the latest schema version. It is recommended to update the schema configuration to update the schema version to the latest version in the future.

Runbookhttps://github.com/grafana/loki/blob/main/operator/docs/lokistack/sop.md#Lokistack-Schema-Upgrades-Required

~~~