Update README.md

Author: lhuans

README.md

@@ -1,7 +1,7 @@
 <p align="center">
   <a href="" target="_blank" rel="noopener noreferrer">
     <img alt="OpenTiny TinyAgent Logo" src="./docs/src/public/logo.svg" height="100" style="max-width:100%;vertical-align: middle">
-    <span style="font-size: 36px; vertical-align: middle; margin-left: 24px">OpenTiny TinyAgent</span>
+    <h1 style="margin-left: 24px">OpenTiny TinyAgent</h1>
   </a>
 </p>
 <p align="center">Enable AI to understand and operate user interfaces based on MCP protocol to complete user tasks.</p>