updated actions/setup-python to v6 (#604)

Author: firewave

.github/workflows/CI-windows.yml

@@ -33,7 +33,7 @@ jobs:
         uses: microsoft/setup-msbuild@v2
 
       - name: Set up Python 3.13
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.13'
           check-latest: true