[🏭 infra] Update actions/download-artifact action to v6

Author: blackfire-tortue-geniale

.github/workflows/release_prod.yml

@@ -53,7 +53,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Download build artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: wheel_dist
       - run: |