Add windows-2025 to test matrix, nonstd-lite isuue 86

nonstd-lite/nonstd-lite#86

Author: martinmoene

.github/workflows/ci.yml

@@ -86,7 +86,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [windows-2022]
+        os: [windows-2022, windows-2025]
 
     runs-on: ${{ matrix.os }}