Bump actions/download-artifact from 4 to 5 (#463)

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

Author: dependabot[bot]

.github/workflows/testpypi-release.yaml

@@ -62,7 +62,7 @@ jobs:
     steps:
       - uses: actions/setup-python@v5
         name: Install Python
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v5
         with:
           name: releases
           path: dist