Update README.md

Author: LittleStar-OuO

README.md

@@ -1,18 +1,15 @@
-MangaDex Plugin  
-============  
+# MangaDex Plugin  
 
 A Rulia plugin for reading [MangaDex](https://mangadex.org).  
 
-Description  
-----------  
+## Description  
 
 * It works.  
 * You need to customize the Http header in the plugin configuration, with the key being `User-Agent` and the value being `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36 Edg/119.0.0.0`.
 * There are a lot of bugs, I'll fix them when I have time.
 * There are also many shortcomings; I'll make changes when I have time.
 
-Login  
-----  
+## Login  
 
 You can log in in two ways (it works without logging in):