Update infrastructure-network.md

Moving this out of virtual-machines for reporting. Let me know if that isn't the right ms.service.
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cc: @TerryLanfear

Author: cynthn

articles/security/fundamentals/infrastructure-network.md

@@ -7,7 +7,7 @@ author: TerryLanfear
 manager: rkarlin
 
 ms.assetid: 61e95a87-39c5-48f5-aee6-6f90ddcd336e
-ms.service: virtual-machines
+ms.service: security
 ms.subservice: networking
 ms.topic: article
 ms.tgt_pltfrm: na