Github Actions: update action versions

Author: mtmail

.github/workflows/build.yml

@@ -22,9 +22,9 @@ jobs:
         os:
           - ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Setup python for test ${{ matrix.py }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.py }}
       - name: Install tox