Update README with new website and repo information

Clarified purpose of the repository and updated links.

Author: huan

README.md

@@ -2,3 +2,9 @@
 
 - Website has been redirected to <https://wechaty.js.org>
 - Repo has been moved to <https://github.com/wechaty/wechaty.js.org>
+
+This repo just redirect https://wechaty.github.io to https://wechaty.js.org.
+
+That's all.
+
+Huan @ Nov 2025