Update README.md

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README.md

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 ![Flowchart](docs/images/flowchart_en.png)
 
-### Submodule Repositories
+### Dependency repositorys
 
-- [PDF-Extract-Kit](https://github.com/opendatalab/PDF-Extract-Kit)
-  - A Comprehensive Toolkit for High-Quality PDF Content Extraction
+- [PDF-Extract-Kit : A Comprehensive Toolkit for High-Quality PDF Content Extraction](https://github.com/opendatalab/PDF-Extract-Kit) 🚀🚀🚀
 
 ## Getting Started