replaced useage with usage in viewing health info.

Author: subhtk

modules/network-observability-viewing-alerts.adoc

@@ -6,7 +6,7 @@
 [id="network-observability-alert-dashboard_{context}"]
 = Viewing health information
 
-You can access metrics about health and resource useage of the Network Observability Operator from the *Dashboards* page in the web console. A health alert banner that directs you to the dashboard can appear on the *Network Traffic* and *Home* pages in the event that an alert is triggered. Alerts are generated in the following cases:
+You can access metrics about health and resource usage of the Network Observability Operator from the *Dashboards* page in the web console. A health alert banner that directs you to the dashboard can appear on the *Network Traffic* and *Home* pages in the event that an alert is triggered. Alerts are generated in the following cases:
 
 * The *NetObservLokiError* alert occurs if the `flowlogs-pipeline` workload is dropping flows because of Loki errors, such as if the Loki ingestion rate limit has been reached.
 * The *NetObservNoFlows* alert occurs if no flows are ingested for a certain amount of time..Prerequisites