CI: upgrade Windows runner

Author: bblanchon

.github/workflows/ci.yml

@@ -179,7 +179,7 @@ jobs:
 
   conf_test_windows:
     name: Test configuration on Windows
-    runs-on: windows-2019
+    runs-on: windows-2022
     needs: [gcc, clang]
     steps:
       - name: Checkout