GitHub issue: 

https://github.com/openshift/openshift-docs/issues/40311

Which section(s) is the issue in?

1. Viewing logging collector pods
2. Advanced configuration for the log forwarder

What needs fixing?

Fluentd pods have been renamed collector in OpenShift Logging 5.3 (https://access.redhat.com/solutions/6611131).
=> Changes in Procedure: $ oc get pods --selector component=collector -o wide -n openshift-logging
=> Changes in Example output.
2)
Configmap name has changed from fluentd to collector.
=> Changes in Procedure / "4. Check that the new values are in the fluentd->collector config map:" $ oc extract configmap/collector --confirm