Update availability-replica-is-disconnected.md (#30577)

typo

Author: MashaMSFT

docs/database-engine/availability-groups/windows/availability-replica-is-disconnected.md

@@ -122,7 +122,7 @@ The following are possible solutions for this issue:
    1. Then you can test the connection to the remote node. For example:
 
       ```PowerShell
-      $computer = "remote_node" # Replace with Naode name as per your environment.
+      $computer = "remote_node" # Replace with Node name as per your environment.
       $port = "5022"            # Replace with the port from your database_mirroring_endpoints.        
       Test-NetConnection -ComputerName $computer -Port 5022
       ```