Update requirements.txt

requirements.txt

@@ -1,10 +1,11 @@
 torch==2.2.1
 transformers==4.38.2
-langchain==0.1.5
-langchain-community==0.0.28
-gradio==4.24.0
+langchain==0.0.34
+langchain-community==0.0.20
+gradio==3.50.0
 pymupdf==1.24.1
 sentence-transformers==2.3.1
 accelerate==0.27.2
 bitsandbytes==0.42.0
-huggingface-hub==0.21.4
+huggingface-hub==0.21.4
+langsmith==0.0.83