Bump actions/setup-python from 5 to 6 (#4532)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/py-ci.yml

@@ -152,7 +152,7 @@ jobs:
       JUPYTER_PATH: deps/share/jupyter  # Jupyter is not smart enough to handle custom Python paths
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version-file: lambdas/${{ matrix.path }}/.python-version
       - uses: astral-sh/setup-uv@v6