Update requirements

requirements.txt

@@ -1,7 +1,6 @@
-gradio==4.29.0
-langchain==0.1.17
-langchain_chroma==0.1.0
-langchain_community==0.0.36
-langchain_core==0.1.50
-langchain_openai==0.1.6
-langchain_text_splitters==0.0.1
+gradio==4.38.1
+langchain==0.2.9
+langchain_chroma==0.1.2
+langchain_core==0.2.21
+langchain_openai==0.1.17
+pandas==2.2.2