Update community group QR code

Author: jackjls

README.md

@@ -210,12 +210,12 @@ FTSHARE_RUN_INTEGRATION=1 python3 -m pytest tests/test_integration_market.py
 欢迎加入 FTShare 社区交流群，讨论 Python SDK、特色因子、金融数据接口、MCP、Skill 和 Agent 使用。
 
 <p align="center">
-  <img src="./docs/assets/wechat-group-20260918.png" width="320" alt="FTShare 微信社区交流群二维码，有效期至 2026 年 9 月 18 日">
+  <img src="./docs/assets/wechat-group-20260929.png" width="320" alt="FTShare 微信社区交流群二维码，有效期至 2026 年 9 月 29 日">
 </p>
 
 > 群内用于交流使用经验和补充问题信息；Bug、功能需求和接口问题建议优先通过 GitHub Issues 提交，便于公开跟踪和沉淀。
 
-**二维码有效期至 2026 年 9 月 18 日。** 如二维码失效，请在 Issues 中留言。
+**二维码有效期至 2026 年 9 月 29 日。** 如二维码失效，请在 Issues 中留言。
 
 ---
 

README_EN.md

@@ -385,11 +385,11 @@ src/ftshare/
 
 Chinese users are welcome to join the FTShare WeChat community group to discuss SDK usage, interface issues, data access, quantitative research, and Agent / MCP / Skill practices.
 
-<img src="docs/assets/wechat-group-20260918.png" alt="FTShare WeChat community group" width="320" />
+<img src="docs/assets/wechat-group-20260929.png" alt="FTShare WeChat community group" width="320" />
 
 > **Community rules**:
 > - Discussions should be related to FTShare, financial data interfaces, the Python SDK, MCP, Skills, or Agent usage
 > - Advertising, promotion, and unrelated off-topic chat are not allowed
 > - For bugs, feature requests, and interface issues, please open a GitHub Issue first. The group is for quick discussion and follow-up context
 
-**The QR code is valid until September 18, 2026.** If it expires, please open an Issue and the maintainers will update the invitation.
+**The QR code is valid until September 29, 2026.** If it expires, please open an Issue and the maintainers will update the invitation.