Fixing code block

docs/80-add-memory/2-add-memory.mdx

@@ -61,7 +61,7 @@ history_collection.find({"session_id": session_id}).sort("timestamp", 1)
 <summary>Answer</summary>
 <div>
 ```python
-{"role": msg["role"], "content": msg["content"]} for msg in cursor
+[{"role": msg["role"], "content": msg["content"]} for msg in cursor]
 ```
 </div>
 </details>