Document URL:
https://docs.openshift.com/container-platform/4.9/scalability_and_performance/scaling-cluster-monitoring-operator.html#configuring-cluster-monitoring_cluster-monitoring-operator

Section Number and Name:
"Configuring cluster monitoring" part, step 1, cluster-monitoring-config.yml example file:

Describe the issue:
1. The prometheusOperator does not have baseImage/prometheusConfigReloaderBaseImage/configReloaderBaseImage configuration parameters since 4.x
2. All monitoring components don't have a baseImage configuration parameter since 4.x
3. Because the topic is about increasing the storage capacity for Prometheus, only mentioning prometheusK8s and alertmanagerMain parts is fine
4. Change the following:

metadata: 
  name: cluster-monitoring-config
namespace: openshift-monitoring

should be

metadata: 
  name: cluster-monitoring-config
  namespace: openshift-monitoring

5. Since we used cluster-monitoring-config.yaml for most of our docs, example:
https://docs.openshift.com/container-platform/4.9/monitoring/configuring-the-monitoring-stack.html
we should use the same postfix 'yaml', so to staty consistent we should change all instances of cluster-monitoring-config.yml to cluster-monitoring-config.yaml throughout the page

Suggestions for improvement:
1. Change all instances of cluster-monitoring-config.yml to cluster-monitoring-config.yaml in the page
2. Example configuration code should be changed to:
****************************

apiVersion: v1
kind: ConfigMap
data: 
  config.yaml: |
    prometheusK8s: 
      retention: \{{PROMETHEUS_RETENTION_PERIOD}}
      nodeSelector: 
        node-role.kubernetes.io/infra: ""
      volumeClaimTemplate: 
        spec: 
          storageClassName: gp2
          resources: 
            requests: 
              storage: \{{PROMETHEUS_STORAGE_SIZE}}
    alertmanagerMain: 
      nodeSelector: 
        node-role.kubernetes.io/infra: ""
      volumeClaimTemplate: 
        spec: 
          storageClassName: gp2
          resources: 
            requests: 
              storage: \{{ALERTMANAGER_STORAGE_SIZE}}
metadata: 
  name: cluster-monitoring-config
  namespace: openshift-monitoring

****************************

Additional information:
4.5 and below versions are no longer supported, we only need to change for 4.6 and above versions
4.9 doc:
https://docs.openshift.com/container-platform/4.9/scalability_and_performance/scaling-cluster-monitoring-operator.html#configuring-cluster-monitoring_cluster-monitoring-operator

4.8 doc:
https://docs.openshift.com/container-platform/4.8/scalability_and_performance/scaling-cluster-monitoring-operator.html#configuring-cluster-monitoring_cluster-monitoring-operator

4.7 doc:
https://docs.openshift.com/container-platform/4.7/scalability_and_performance/scaling-cluster-monitoring-operator.html#configuring-cluster-monitoring_cluster-monitoring-operator

4.6 doc:
https://docs.openshift.com/container-platform/4.6/scalability_and_performance/scaling-cluster-monitoring-operator.html#configuring-cluster-monitoring_cluster-monitoring-operator