Update requirements.txt

requirements.txt

@@ -1,7 +1,8 @@
 gradio
 requests
 pandas
-langchain-community>=0.0.20  # Or a more recent version
-langchain-core>=0.1.20    # Or a more recent version
-huggingface_hub>=0.20.0     # Or a more recent version
-# python-dotenv # If you use it for local testing
+langchain
+langchain-community
+huggingface-hub>=0.20.2 
+# Add other dependencies like sentence-transformers if needed by chosen models/tools later
+# python-dotenv # If you were using it