Switch CI to windows-2025 for testing

Author: chuckhoupt

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
      - run: CFLAGS=-m32 ./cibuild
 
   Windows:
-    runs-on: windows-latest
+    runs-on: windows-2025
     steps:
      - uses: actions/checkout@v3
      - uses: ruby/setup-ruby@v1