Update actions/download-artifact action to v8

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

Author: renovate[bot]

.github/workflows/main.yml

@@ -151,7 +151,7 @@ jobs:
 
     steps:
       - name: Download all the dists
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v8
         with:
           name: python-package-distributions
           path: dist/
@@ -172,7 +172,7 @@ jobs:
 
     steps:
       - name: Download all the dists
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v8
         with:
           name: python-package-distributions
           path: dist/