Use release VS

NN--- · web-flow · commit 8b36b7e204f0 · 2020-11-24T10:57:41.000+02:00
https://www.appveyor.com/updates/
diff --git a/appveyor.yml b/appveyor.yml
@@ -1,5 +1,5 @@
 ﻿configuration: Release
-image: Visual Studio 2019 Preview
+image: Visual Studio 2019
 version: '3.3.0.{build}'
 
 #environment:
