Updated CI

Author: ankane

.github/workflows/build.yml

@@ -9,7 +9,7 @@ jobs:
         python: [3.14, 3.9]
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python }}
       - run: pip install --group dev