Update requirements.txt

added langchain dependencies

ImportError: cannot import name 'pipeline' from 'transformers'

PyPDF2 to read pdf dataand print pages

ImportError: cannot import name 'GRPCIndex' from 'pinecone'

ImportError: cannot import name 'GRPCIndex' from 'pinecone'

ImportError: cannot import name 'GRPCIndex' from 'pinecone'

ImportError: cannot import name 'GRPCIndex' from 'pinecone'

pinecone-client[grpc] 2.2.1 depends on protobuf==3.19.3; extra == "grpc"

update env var

update req.txt

update req.txt

update req.txt

update req.txt

update req.txt

updates