Update README.md

Author: Chat2DB-Pro

README.md

@@ -1,5 +1,5 @@
 <p align="center">
-    <a href="https://chat2db-ai.com/" target="_blank">
+    <a href="https://chat2db.ai/" target="_blank">
         <img src="https://chat2db-cdn.oss-us-west-1.aliyuncs.com/website/img/cover.png" alt="Chat2DB" />
     </a>
 </p>