Bump actions/download-artifact from 3 to 4 (#1314)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](https://github.com/actions/download-artifact/compare/v3...v4)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  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>

.github/workflows/ci.yaml

@@ -243,7 +243,7 @@ jobs:
         fail-on-cache-miss: true
 
     - name: Download all coverage artifacts
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
 
     - name: Combine ${{ matrix.plex }} coverage results
       run: |

.github/workflows/pypi.yml

@@ -53,7 +53,7 @@ jobs:
       id-token: write
     steps:
     - name: Download builds
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
 
     - name: Publish to PyPI
       uses: pypa/gh-action-pypi-publish@release/v1