fix artifact upload

.github/workflows/benchmark.yml

@@ -123,14 +123,11 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Download results for each tracker
-        run: |
-          trackers=("ocsort" "bytetrack" "botsort" "hybridsort" "deepocsort" "imprassoc" "strongsort")
-          for tracker in "${trackers[@]}"; do
-            echo "Downloading results for $tracker..."
-            artifact_name="results-${{ github.run_id }}-$tracker"
-            gh run download ${{ github.run_id }} --name "$artifact_name" --dir results
-          done
+      - name: Download all results artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: results-${{ github.run_id }}  # No need to download each separately since all trackers were handled in the matrix
+          path: results
 
       - name: Check downloaded files
         run: |