chore: rename README-zh.md -> README.zh.md

Author: jaywcjlove

README.md

@@ -7,7 +7,7 @@
   <h1>Web Serve</h1>
   <!--rehype:style=border: 0;-->
   <p>
-    <a href="./README-zh.md">中文</a> • 
+    <a href="./README.zh.md">中文</a> • 
     <a target="_blank" href="https://wangchujiang.com/#/contact">Contact & Support</a>
   </p>
   <p>