fix minor bug

app.py

@@ -43,7 +43,7 @@ def construct_summary():
         total_page = knowledge_base[key]['total_pages']
         summary = knowledge_base[key]['summarized_content']
         file_context = f"""
-            ##＃ 文件摘要
+            ### 文件摘要
             {file_name}  (共 {total_page} 頁)<br><br>
             {summary}<br><br>
         """