update cli_demo.py

pdf_requirements.txt

-langchain>=0.0.124
-transformers==4.27.1
-unstructured[local-inference]
-layoutparser[layoutmodels,tesseract]
-nltk
-sentence-transformers
-beautifulsoup4
-icetk
-cpm_kernels
-faiss-cpu
-gradio>=3.25.0
-detectron2@git+https://github.com/facebookresearch/detectron2.git@v0.6#egg=detectron2
\ No newline at end of file

requirements.txt

-langchain>=0.0.124
-transformers==4.27.1
-unstructured[local-inference]
-layoutparser[layoutmodels,tesseract]
-nltk
-sentence-transformers
-beautifulsoup4
-icetk
-cpm_kernels
-faiss-cpu
-gradio>=3.25.0
\ No newline at end of file