Bump actions/download-artifact from 3 to 4.1.7 in /.github/workflows

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 3 to 4.1.7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v3...v4.1.7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/bld_wheels_and_upload.yml

@@ -119,7 +119,7 @@ jobs:
     #upload to PyPI on every tag starting with 'v'
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
     steps:
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v4.1.7
       with:
         # unpacks default artifact into dist/
         #if `name: artifact` is omitted, the action will create extra parent dir