Update requirements.txt

requirements.txt

@@ -1,4 +1,4 @@
 gradio==3.28.0
 yfinance==0.2.22
-llama-index==0.6.5  # Replace with the actual version if needed
-chatgroq==0.1.0     # Replace with the actual version if needed
+langchain-groq==0.2.3
+langchain==0.0.130