ci: use Windows 2019 in build-and-test-windows

Signed-off-by: jakezhu9 <[email protected]>

Author: jakezhu9

.github/workflows/main_windows.yml

@@ -7,7 +7,7 @@ on:
       - "releases/*"
 jobs:
   build-and-test:
-    runs-on: windows-latest
+    runs-on: windows-2019
     steps:
       - name: Git checkout
         uses: actions/checkout@v2