Bump actions/download-artifact from 4 to 5

Bumps [actions/download-artifact](https://github.com/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/download-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/release.yml

@@ -30,7 +30,7 @@ jobs:
 
     steps:
 
-    - uses: actions/download-artifact@v4
+    - uses: actions/download-artifact@v6
       with:
         name: dist
         path: dist/

.github/workflows/tests.yaml

@@ -73,7 +73,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip tox
 
-    - uses: actions/download-artifact@v4
+    - uses: actions/download-artifact@v6
       with:
         name: dist
         path: dist/
@@ -124,7 +124,7 @@ jobs:
         python -m pip install --upgrade coverage[toml] diff_cover
 
     - name: Download coverage reports
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v6
       with:
         pattern: coverage-*
         merge-multiple: true