Bump actions/setup-python from 5 to 6

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 5 to 6. - [Release notes](https://github.com/actions/setup-python/releases) - [Commits](actions/setup-python@v5...v6) --- updated-dependencies: - dependency-name: actions/setup-python dependency-version: '6' dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/build-release.yml

@@ -23,7 +23,7 @@ jobs:
  - { name: "3.13-madev", python: "3.13", tox: py313-marshmallowdev }
  steps:
  - uses: actions/checkout@v5.0.0
- - uses: actions/setup-python@v5
+ - uses: actions/setup-python@v6
  with:
  python-version: ${{ matrix.python }}
  - run: pip install tox
@@ -33,7 +33,7 @@ jobs:
  runs-on: ubuntu-latest
  steps:
  - uses: actions/checkout@v5.0.0
- - uses: actions/setup-python@v5
+ - uses: actions/setup-python@v6
  with:
  python-version: "3.13"
  - name: Install pypa/build
@@ -56,7 +56,7 @@ jobs:
  runs-on: ubuntu-latest
  steps:
  - uses: actions/checkout@v5.0.0
- - uses: actions/setup-python@v5
+ - uses: actions/setup-python@v6
  with:
  python-version: "3.13"
  - run: python -m pip install tox