Update app.py

app.py

@@ -11,7 +11,7 @@ JSON_DATASET_PATH = "./file/userdata.json"
 LEADERBORAD_INTRODUCTION = """# AutoEval-Video Leaderboard
     
     Welcome to the leaderboard of AutoEval-Video!
-    AutoEval-Video comprises 327 complex open-ended video-question instances that span across nine skill dimensions, which address video-specific perception, comprehension, and generation skills. Please refer to our [paper]() for more details.
+    AutoEval-Video comprises 327 complex open-ended video-question instances that span across nine skill dimensions, which address video-specific perception, comprehension, and generation skills. Please refer to our [paper](https://arxiv.org/abs/2311.14906) for more details.
     """
 
 SUBMIT_INTRODUCTION = """# Submit Introduction