Update requirements.txt

change version langchain and llama.cpp

requirements.txt

@@ -1,7 +1,9 @@
-faiss-cpu==1.7.4
-langchain==0.1.1
+langchain==0.0.306
+PyPDF2==3.0.1
+streamlit==1.25.0
+torch==2.0.1
+transformers==4.31.0
+llama-cpp-python==0.2.10
+pypdf==3.14.0
 sentence-transformers==2.2.2
-sentencepiece==0.1.99
-streamlit==1.30.0
-llama_cpp_python==0.2.31
-pypdf==4.0.0
+faiss-cpu==1.7.4