Update docs/advanced/cluster-shutdown.md

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

Author: FrankYang0529

docs/advanced/cluster-shutdown.md

@@ -8,7 +8,7 @@ title: "Cluster Shutdown and Restart"
 
 To gracefully shut down a Harvester cluster, please take the following steps to keep the data safe:
 
-1. Shutdown all VMs.
+1. Shut down all VMs.
 2. Take backups for all VMs.
 3. Download all VM Images. (Since Harvester hasn't automatically backup VM Images in the backup target, you have to keep VM Images by yourself.)
 4. Shutdown all agent nodes.