windows: switch the image tag to ltsc2019

This should have no functional difference as 1809 is an alias
to ltsc2019 but it makes it more explicit that what branch we
are tracking

diff --git a/docker/windows/Dockerfile b/docker/windows/Dockerfile
index 580ab2e..7c86152 100644 (file)
--- a/docker/windows/Dockerfile
+++ b/docker/windows/Dockerfile
@@ -1,6 +1,6 @@
 # escape=`
 
-FROM 'mcr.microsoft.com/windows/servercore:1809'
+FROM 'mcr.microsoft.com/windows/servercore:ltsc2019'
 
 # Make sure any failure in PowerShell scripts is fatal
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop';"]