Bump actions/setup-python from 5 to 6 (#510)

See https://github.com/actions/setup-python/releases/tag/v6.0.0.

.github/workflows/lint.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.x"
       - uses: pre-commit/action@v3.0.1

.github/workflows/update.yml

@@ -48,7 +48,7 @@ jobs:
           git checkout --progress --force -B ${{ github.ref_name }} refs/remotes/origin/${{ github.ref_name }} || true
 
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.11'
           cache: 'pip'