Update windows-latest to windows-2025 in GitHub Actions. windows-latest is deprecated.

Author: JoostGevaert

.github/workflows/tests.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-latest, windows-2025]
         python-version: ['3.10', '3.12']
 
     steps: