Update docs/advanced/cluster-shutdown.md

Co-authored-by: vickyhella <[email protected]>

Author: FrankYang0529

docs/advanced/cluster-shutdown.md

@@ -4,7 +4,7 @@ sidebar_label: Cluster Shutdown and Restart
 title: "Cluster Shutdown and Restart"
 ---
 
-## Shutdown a Harvester cluster
+## Shut down a Harvester cluster
 
 To gracefully shutdown a Harvester cluster, please run the following steps to keep the data safe.