Update respond-machine-alerts.md

Added restriction regarding collection of investigation packages.

Author: l1l1l1l1pqr

defender-endpoint/respond-machine-alerts.md

@@ -114,6 +114,9 @@ Or, use this alternate procedure:
 4. Select **Package collection package available** to download the collection package.
 
    ![Image of download package](media/download-package.png)
+
+> [!NOTE]
+> The collection of the investigation package may fail if the device's battery level is low or if the machine is on a metered connection.
    
 ### Investigation package contents for Windows devices