Update supported platforms in offboard-machines.md

Author: denisebmsft

defender-endpoint/offboard-machines.md

@@ -30,9 +30,13 @@ ms.date: 03/01/2025
 
 **Platforms**
 - macOS
-- Linux
+- Linux Server
 - Windows client devices
-- Windows Server 2012 R2 and later
+- Windows Server 2025
+- Windows Server 2022
+- Windows Server 2019
+- Windows Server 2016
+- Windows Server 2012 R2
 
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