Update aliases.json (#26597)

Replaced Windows OS images with Gen2 equivalent

Author: AjKundnani

arm-compute/quickstart-templates/aliases.json

@@ -63,7 +63,7 @@
           "Win2022Datacenter": {
             "publisher": "MicrosoftWindowsServer",
             "offer": "WindowsServer",
-            "sku": "2022-Datacenter",
+            "sku": "2022-datacenter-g2",
             "version": "latest",
             "architecture": "x64"
           },
@@ -77,14 +77,14 @@
           "Win2019Datacenter": {
             "publisher": "MicrosoftWindowsServer",
             "offer": "WindowsServer",
-            "sku": "2019-Datacenter",
+            "sku": "2019-datacenter-gensecond",
             "version": "latest",
             "architecture": "x64"
           },
           "Win2016Datacenter": {
             "publisher": "MicrosoftWindowsServer",
             "offer": "WindowsServer",
-            "sku": "2016-Datacenter",
+            "sku": "2016-datacenter-gensecond",
             "version": "latest",
             "architecture": "x64"
           },