CI now uses upload/download artifact v4 everywhere :)

Author: marceltaeumel

.github/workflows/bundle.yml

@@ -148,7 +148,7 @@ jobs:
           path: tmp
 
       - name: Download artifacts
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           name: ${{ matrix.smalltalk }}
           path: tmp