Update CD.yml

Modified to use 2019 server to support building .Net Framework 4.6.1

Author: ShawnLaMountain

.github/workflows/CD.yml

@@ -24,7 +24,7 @@ env:
 jobs:
   pack:
 
-    runs-on: [windows-latest]
+    runs-on: [windows-2019]
 
     steps:
     - name: Checkout