ci: specify version of windwos to fix build issues (#533)

Author: libotony

.github/workflows/release.yaml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-latest, ubuntu-18.04, windows-latest]
+        os: [macos-11, ubuntu-18.04, windows-2019]
     steps:
       - uses: actions/checkout@v2