Adding confirm description

Author: get-itips

sharepoint/sharepoint-ps/sharepoint-online/Start-SPOSiteRename.md

@@ -187,7 +187,7 @@ Accept wildcard characters: False
 
 ### -Confirm
 
-PARAMVALUE: SwitchParameter
+Prompts you for confirmation before executing the command. For more information, type the following command: `get-help about_commonparameters`
 
 ```yaml
 Type: SwitchParameter