chore(deps): bump actions/download-artifact (#5792)

Bumps the actions group with 1 update in the / directory: [actions/download-artifact](https://github.com/actions/download-artifact).


Updates `actions/download-artifact` from 4 to 5
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](https://github.com/actions/download-artifact/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

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

.github/workflows/nightlies.yml

@@ -44,7 +44,7 @@ jobs:
     needs: [build_wheel]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v5
         with:
           name: Packages
           path: dist

.github/workflows/pip.yml

@@ -100,7 +100,7 @@ jobs:
 
     steps:
     # Downloads all to directories matching the artifact names
-    - uses: actions/download-artifact@v4
+    - uses: actions/download-artifact@v5
 
     - name: Generate artifact attestation for sdist and wheel
       uses: actions/attest-build-provenance@v2