Bump actions/download-artifact from 5 to 6 (#98)

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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/coverage.yml

@@ -51,7 +51,7 @@ jobs:
         id: download_base
         # it may not exist yet, so ignore
         continue-on-error: true
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: base-coverage-${{ env.MERGE_BASE_COMMIT }}
 

.github/workflows/publish.yml

@@ -41,7 +41,7 @@ jobs:
       id-token: write
     steps:
     - name: Download distribution files from artifact
-      uses: actions/download-artifact@de96f4613b77ec03b5cf633e7c350c32bd3c5660
+      uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53
       with:
         name: python-package-distributions
         path: dist/