Update actions/setup-python action to v6

Author: renovate[bot]

.github/workflows/ci-chart.yaml

@@ -25,7 +25,7 @@ jobs:
         with:
           version: v3.17.0
 
-      - uses: actions/setup-python@v5.6.0
+      - uses: actions/setup-python@v6.2.0
         with:
           python-version: "3.x"
           check-latest: true