Build: Bump actions/download-artifact from 4 to 5 (#2310)

Author: dependabot[bot]

.github/workflows/nightly-pypi-build.yml

@@ -71,7 +71,7 @@ jobs:
 
     steps:
     - name: Download all the artifacts
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v5
       with:
         merge-multiple: true
         path: dist/