chore: closing </a> after chat (vuejs#7059)

oversight, chat link was left open

Author: davidnuescheler

README.md

@@ -6,7 +6,7 @@
   <a href="https://www.npmjs.com/package/vue"><img src="https://img.shields.io/npm/dm/vue.svg" alt="Downloads"></a>
   <a href="https://www.npmjs.com/package/vue"><img src="https://img.shields.io/npm/v/vue.svg" alt="Version"></a>
   <a href="https://www.npmjs.com/package/vue"><img src="https://img.shields.io/npm/l/vue.svg" alt="License"></a>
-  <a href="https://chat.vuejs.org/"><img src="https://img.shields.io/badge/chat-on%20discord-7289da.svg" alt="Chat">
+  <a href="https://chat.vuejs.org/"><img src="https://img.shields.io/badge/chat-on%20discord-7289da.svg" alt="Chat"></a>
   <br>
   <a href="https://saucelabs.com/u/vuejs"><img src="https://saucelabs.com/browser-matrix/vuejs.svg" alt="Sauce Test Status"></a>
 </p>