Bump actions/download-artifact from 5 to 6 (#588)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v5...v6)

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

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

Author: dependabot[bot]

.github/workflows/release.yml

@@ -73,7 +73,7 @@ jobs:
           echo "$PWD/.venv/bin" >> $GITHUB_PATH
 
       - name: Download sdist from artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: pyogrio-sdist
           path: wheelhouse
@@ -305,7 +305,7 @@ jobs:
           "$PWD/.venv/Scripts" | Out-File -FilePath $env:GITHUB_PATH -Append
 
       - name: Download wheels from artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: ${{ matrix.artifact }}
           path: wheelhouse
@@ -347,7 +347,7 @@ jobs:
     if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags/')
 
     steps:
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           pattern: pyogrio-*
           path: dist