Add windows-latest to test matrix

Author: ppolewicz

.github/workflows/ci.yml

@@ -147,7 +147,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [windows-2019]
+        os: [windows-2019, windows-latest]
     steps:
       - uses: actions/checkout@v3
         with: