pinned windows runner to windows-2019 to fix build

Author: ubidefeo

.github/workflows/build.yml

@@ -24,7 +24,7 @@ jobs:
       fail-fast: false
       matrix:
         config:
-          - os: windows-latest
+          - os: windows-2019
           - os: ubuntu-latest
           - os: macos-latest
     runs-on: ${{ matrix.config.os }}