docs: fixed and updated twitter logo (#15576)

Co-authored-by: fisker Cheung <lionkay@gmail.com>

README.md

@@ -55,7 +55,7 @@
   <a href="#badge">
     <img alt="code style: prettier" src="https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square"></a>
   <a href="https://twitter.com/PrettierCode">
-    <img alt="Follow Prettier on Twitter" src="https://img.shields.io/twitter/follow/prettiercode.svg?label=follow+prettier&style=flat-square"></a>
+    <img alt="Follow Prettier on Twitter" src="https://img.shields.io/badge/%40PrettierCode-9f9f9f?style=flat-square&logo=x&labelColor=000"></a>
 </p>
 
 ## Intro