update function name and requirements.txt

requirements.txt

 langchain
 transformers
 unstructured[local-inference]
-detectron2@git+https://github.com/facebookresearch/detectron2.git@v0.6#egg=detectron2
 layoutparser[layoutmodels,tesseract]
 nltk
 sentence-transformers
+beautifulsoup4
+icetk
+cpm_kernels
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