update README.md

Author: bowenliang123

README.md

@@ -1,5 +1,6 @@
 <div align="center">
   <img src="https://raw.githubusercontent.com/bowenliang123/markdown-exporter/main/_assets/icon.png" alt="Markdown Exporter Logo" width="200">
+  <div></div>
   <p align="center">
     <a href="https://github.com/bowenliang123/markdown-exporter" target="_blank">
         <img alt="Github" src="https://img.shields.io/badge/bowenliang123-markdown--exporter-white?logo=github"></a>