chore(deps): update actions/setup-python action to v6

Author: renovate[bot]

.github/workflows/python-publish.yaml

@@ -15,7 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.x"
       - name: Install pypa/build