fixed the import of DuckDuckGoSearchRun

agent.py

@@ -9,7 +9,8 @@ from youtube_transcript_api import YouTubeTranscriptApi
 from typing import TypedDict, Dict, Any, Optional, List
 
 from langchain.tools import Tool
-from langchain_community.utilities import WikipediaAPIWrapper, ArxivAPIWrapper, DuckDuckGoSearchRun
+from langchain_community.utilities import WikipediaAPIWrapper, ArxivAPIWrapper
+from langchain_community.tools import DuckDuckGoSearchRun
 from langchain_community.embeddings import HuggingFaceEmbeddings
 from langchain_community.vectorstores import FAISS
 from langchain_openai import ChatOpenAI