Update requirements.txt

requirements.txt

@@ -1,8 +1,9 @@
-openai>=1.13.3       
-python-dotenv>=1.0.1   
-smolagents[toolkit]>=0.5
-wikipedia==1.4.0
-arxiv==1.4.8           
-gradio>=4.15.0
-pandas>=2.2.0
-requests>=2.31.0
+openai    
+python-dotenv 
+smolagents
+wikipedia
+arxiv           
+gradio
+pandas
+requests
+duckduckgo-search