Use WindowsServer VHDs with Oct patches (#2155)

packer/windows-vhd-builder.json

@@ -25,7 +25,7 @@
             "image_publisher": "MicrosoftWindowsServer",
             "image_offer": "WindowsServer",
             "image_sku": "2019-Datacenter-Core-smalldisk",
-            "image_version": "17763.737.1909062324",
+            "image_version": "17763.805.1910061628",
             "resource_group_name": "{{user `resource_group_name`}}",
             "capture_container_name": "aksengine-vhds-windows-ws2019",
             "capture_name_prefix": "aksengine-{{user `create_time`}}",

pkg/api/azenvtypes.go

@@ -178,7 +178,7 @@ var (
 		ImageOffer:     "WindowsServer",
 		ImageSku:       "2019-Datacenter-Core-with-Containers-smalldisk",
 		ImagePublisher: "MicrosoftWindowsServer",
-		ImageVersion:   "17763.737.1909062324",
+		ImageVersion:   "17763.805.1910061628",
 	}
 
 	// ACC1604OSImageConfig is the ACC image based on Ubuntu 16.04.