Update docs/advanced/cluster-shutdown.md

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

Author: FrankYang0529

docs/advanced/cluster-shutdown.md

@@ -11,8 +11,8 @@ To gracefully shut down a Harvester cluster, please take the following steps to
 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.
-5. Shutdown all management nodes.
+4. Shut down all agent nodes.
+5. Shut down all management nodes.
 
 ## Restart a Harvester cluster