chore(github-actions): update actions/download-artifact action to v8 (#64)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/publish_pypi_prod.yml

@@ -25,7 +25,7 @@ jobs:
     steps:
       # Download artifacts from the build job
       - name: Download Artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: dist
           path: dist

.github/workflows/publish_pypi_test.yml

@@ -23,7 +23,7 @@ jobs:
     steps:
       # Download artifacts from the build job
       - name: Download Artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: dist
           path: dist