Fix a bug

app.py

@@ -65,7 +65,7 @@ else:
                     "problem_id": [int(problem['problem_id']) for problem in problem_dict.values()],
                     "difficulty": [str(problem['difficulty']) for problem in problem_dict.values()],
                     "type": [str(problem['type']) for problem in problem_dict.values()],
-                    "problem_link": ["https://huggingface.co/spaces/Elfsong/CodeArena/?problem=" + str(problem['problem_id']) for problem in problem_dict.values()],
+                    "problem_link": ["https://huggingface.co/spaces/Elfsong/CodeArena/?problem=" + str(problem['title']) for problem in problem_dict.values()],
                     "acceptance_rate": [[random.randint(0, 100) for _ in range(20)] for problem in problem_dict.values()],
                 }
             )