Update antimalware-code-samples.md

Author: dorothyhu

articles/security/fundamentals/antimalware-code-samples.md

@@ -182,6 +182,7 @@ The code sample below shows how you can add Microsoft Antimalware for Azure Arc-
 
 ```powershell
 #Before using Azure PowerShell to manage VM extensions on your hybrid server managed by Azure Arc-enabled servers, you need to install the Az.ConnectedMachine module. Run the following command on your Azure Arc-enabled server:
+#If you have Az.ConnectedMachine installed, please make sure the version is at least 0.4.0
 install-module -Name Az.ConnectedMachine
 Import-Module -name Az.ConnectedMachine