fix backend bug

app.py

@@ -36,8 +36,9 @@ def get_benchmark_df(benchmark):
         f"./llm-perf-dataset/reports/{benchmark}/inference_report.csv")
     # preprocess
     df["model"] = df["model"].apply(make_clickable_model)
-    df["backend"] = df["backend"].str.replace("pytorch", "Pytorch")
-    df["backend"] = df["backend"].str.replace("onnxruntime", "OnnxRuntime")
+    df["backend.name"] = df["backend.name"].str.replace("pytorch", "Pytorch")
+    df["backend.name"] = df["backend.name"].str.replace(
+        "onnxruntime", "OnnxRuntime")
     # filter
     df = df[list(COLUMNS_MAPPING.keys())]
     # rename