Updated checkout action

Author: ankane

.github/workflows/build.yml

@@ -8,7 +8,7 @@ jobs:
       matrix:
         python: [3.14, 3.9]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python }}