Update requirements.txt

requirements.txt

@@ -1,10 +1,8 @@
-langchain==0.0.184
-PyPDF2==3.0.1
-python-dotenv==1.0.0
-streamlit==1.18.1
-faiss-cpu==1.7.4
-altair==4
-tiktoken==0.4.0
-huggingface-hub==0.14.1
-InstructorEmbedding==1.0.1
-sentence-transformers==2.2.2
+streamlit
+langchain
+langchain-community
+langchain-core
+chromadb
+tiktoken
+huggingface_hub
+langchain-nomic