Bump actions/download-artifact from 1 to 4

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 1 to 4.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v1...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -280,7 +280,7 @@ jobs:
         with:
           python-version: ${{ matrix.python }}
 
-      - uses: actions/download-artifact@v1
+      - uses: actions/download-artifact@v4
         with:
           name: wheels
 

.github/workflows/pypi.yml

@@ -85,7 +85,7 @@ jobs:
       id-token: write
 
     steps:
-      - uses: actions/download-artifact@v1
+      - uses: actions/download-artifact@v4
         with:
           name: wheels