chore(deps): bump the actions group across 1 directory with 3 updates

Bumps the actions group with 3 updates in the / directory: [actions/checkout](https://github.com/actions/checkout), [actions/setup-python](https://github.com/actions/setup-python) and [actions/download-artifact](https://github.com/actions/download-artifact).


Updates `actions/checkout` from 4 to 5
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

Updates `actions/setup-python` from 5 to 6
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v5...v6)

Updates `actions/download-artifact` from 4 to 5
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: actions/setup-python
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: actions/download-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -30,9 +30,9 @@ jobs:
     outputs:
       wheel-distribution: ${{ steps.wheel-distribution.outputs.path }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with: {fetch-depth: 0}  # deep clone for setuptools-scm
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with: {python-version: "3.10"}
       - uses: astral-sh/setup-uv@v6
       - name: Run static analysis and format checkers
@@ -78,16 +78,16 @@ jobs:
         - windows-latest
     runs-on: ${{ matrix.platform }}
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python }}
       - uses: astral-sh/setup-uv@v6
       - name: Retrieve pre-built distribution files
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with: {name: python-distribution-files, path: dist/}
       - name: Retrieve test download files
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           name: test-download-files
           path: ${{ env.VALIDATE_PYPROJECT_CACHE_REMOTE }}
@@ -122,12 +122,12 @@ jobs:
     if: ${{ github.event_name == 'push' && contains(github.ref, 'refs/tags/') }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@v5
+      - uses: actions/setup-python@v6
         with: {python-version: "3.10"}
       - uses: astral-sh/setup-uv@v6
       - name: Retrieve pre-built distribution files
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with: {name: python-distribution-files, path: dist/}
       - name: Publish Package
         env: