Update readme.md

Author: BruceYanghy

fingpt/readme.md

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 * [FinGPT-Benchmark](https://github.com/AI4Finance-Foundation/FinGPT/tree/master/fingpt/FinGPT_Benchmark): FinGPT Instruction Tuning paradigm for task-specific, multi-task, and zero-shot instruction tuning tasks
 * [FinGPT-RAG](https://github.com/AI4Finance-Foundation/FinGPT/tree/master/fingpt/FinGPT_RAG): FinGPT using Retrieval Augmented Generation pipeline
 * [FinGPT-v1](https://github.com/AI4Finance-Foundation/FinGPT/tree/master/fingpt/FinGPT_v1): FinGPT from Market labels in Chinese Market
-* [FinGPT-v2](https://github.com/AI4Finance-Foundation/FinGPT/tree/master/fingpt/FinGPT_v2): FinGPT building POC using ChatGPT
+* [FinGPT-v2](https://github.com/AI4Finance-Foundation/FinGPT/tree/master/fingpt/FinGPT_v2): FinGPT building POC using ChatGPT, such as Robo-advisor, low-code development, and trading
 * [FinGPT-v3](https://github.com/AI4Finance-Foundation/FinGPT/tree/master/fingpt/FinGPT_v3): FinGPT for Sentiment Analysis in U.S. Market