Update actions/setup-python action to v6

Author: renovate[bot]

.github/workflows/preview-release.yaml

@@ -25,7 +25,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: "3.12"