update: contact email (#269)

Author: xhd0728

README.md

@@ -255,6 +255,7 @@ If you find this repository helpful for your research, please consider giving us
 
 - For technical issues and feature requests, please use [GitHub Issues](https://github.com/OpenBMB/UltraRAG/issues).
 - For questions about usage, feedback, or any discussions related to RAG technologies, you are welcome to join our [WeChat group](https://github.com/OpenBMB/UltraRAG/blob/main/docs/wechat_qr.png), [Feishu group](https://github.com/OpenBMB/UltraRAG/blob/main/docs/feishu_qr.png), and [Discord](https://discord.gg/yRFFjjJnnS) to exchange ideas with us.
+- If you have any questions, feedback, or would like to get in touch, please feel free to reach out to us via email at yanyk.thu@gmail.com
 
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docs/README_zh.md

@@ -253,6 +253,7 @@ Hello, UltraRAG v3!
 
 - 关于技术问题及功能请求，请使用 [GitHub Issues](https://github.com/OpenBMB/UltraRAG/issues) 功能。
 - 关于使用上的问题、意见以及任何关于 RAG 技术的讨论，欢迎加入我们的[微信群组](https://github.com/OpenBMB/UltraRAG/blob/main/docs/wechat_qr.png)，[飞书群组](https://github.com/OpenBMB/UltraRAG/blob/main/docs/feishu_qr.png)和[discord](https://discord.gg/yRFFjjJnnS)，与我们共同交流。
+- 如果您有任何疑问、反馈或想与我们取得联系，请随时通过电子邮件发送至 yanyk.thu@gmail.com。
 
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