chore: update logo in README.md

Soulter · web-flow · commit e34d9504e457 · 2026-04-09T17:27:09.000+08:00
diff --git a/README.md b/README.md
@@ -1,4 +1,5 @@
-![AstrBot-Logo-Simplified](https://github.com/user-attachments/assets/ffd99b6b-3272-4682-beaa-6fe74250f7d9)
+![astrbot-github-banner-v2-light-0405_副本](https://github.com/user-attachments/assets/36fb04e4-cc75-4454-bd8b-049d11aa86f9)
+
 
 <div align="center">
 
