Update README.md

Author: thinkwee

README.md

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 ## 🎉 News
-* **June 25, 2024: 🎉To foster development in LLM-powered multi-agent collaboration🤖🤖 and related fields, the ChatDev team has curated a collection of seminal papers📄 presented in an interactive e-book📚 format. Explore the latest advancements and download the paper list here: https://thinkwee.top/multiagent_ebook**
+* **June 25, 2024: 🎉To foster development in LLM-powered multi-agent collaboration🤖🤖 and related fields, the ChatDev team has curated a collection of seminal papers📄 presented in a [open-source](https://github.com/OpenBMB/ChatDev/tree/main/MultiAgentEbook) interactive e-book📚 format. Now you can explore the latest advancements on the [Ebook Website](https://thinkwee.top/multiagent_ebook) and download the [paper list](https://github.com/OpenBMB/ChatDev/blob/main/MultiAgentEbook/papers.csv).**
   <p align="center">
   <img src='./misc/ebook.png' width=800>
   </p>