chore: Updating Windows VHD base image to include April 2023 security updates (#5088)

Signed-off-by: Mark Rossetti <marosset@microsoft.com>

vhd/packer/windows-2019-vars.json

@@ -2,6 +2,6 @@
     "image_publisher": "MicrosoftWindowsServer",
     "image_offer": "WindowsServer",
     "image_sku": "2019-Datacenter-Core-smalldisk",
-    "image_version": "17763.3887.230107",
+    "image_version": "17763.4252.230404",
     "windows_server_version": "2019"
 }