Change the name of output model to `<model_name>-ONNX`

Previously it was `<author_name>-<model_name>-ONNX`.

app.py

@@ -171,13 +171,7 @@ def main():
             key="user_hf_token",
         )
 
-        model_name = (
-            input_model_id.replace(f"{config.hf_base_url}/", "")
-            .replace("/", "-")
-            .replace(f"{config.hf_username}-", "")
-            .strip()
-        )
-
+        model_name = input_model_id.split("/")[-1]
         output_model_id = f"{config.hf_username}/{model_name}-ONNX"
         output_model_url = f"{config.hf_base_url}/{output_model_id}"