Bump actions/upload-artifact from 5 to 6 (#278)

Author: 4ever2

.github/workflows/build.yml

@@ -96,7 +96,7 @@ jobs:
           echo "::endgroup::"
 
       - name: Upload extraction results
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: extraction-results
           path: extraction/tests/extracted-code