Bump actions/download-artifact from 5 to 6 (#36)

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/ci.yml

@@ -55,7 +55,7 @@ jobs:
     steps:
         - uses: actions/checkout@v6
         - name: download coverage
-          uses: actions/download-artifact@v5
+          uses: actions/download-artifact@v6
           with:
             name: code-coverage-report
         - name: check coverage

.github/workflows/release.yml

@@ -39,7 +39,7 @@ jobs:
 
     steps:
     - name: Download all the dists
-      uses: actions/download-artifact@v5
+      uses: actions/download-artifact@v6
       with:
         name: python-package-distributions
         path: dist/
@@ -60,7 +60,7 @@ jobs:
 
     steps:
     - name: Download all the dists
-      uses: actions/download-artifact@v5
+      uses: actions/download-artifact@v6
       with:
         name: python-package-distributions
         path: dist/