Bump actions/download-artifact from 5 to 6 (#274)

Author: 4ever2

.github/workflows/build.yml

@@ -140,7 +140,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Download extraction results
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: extraction-results
           path: extraction/tests/extracted-code