fix typo (thanks github)

Author: xMistt

README.md

@@ -2,7 +2,7 @@
 
 <p align="center">
     <a href="https://www.python.org/downloads/" align="center">
-        <img alt="Python" src="[https://img.shields.io/badge/python-3.6%20%7C%203.7%20%7C%203.8-blue](https://img.shields.io/badge/python-3.6%20%7C%203.7%20%7C%203.8%20%7C%203.9%20%7C%203.10%20%7C%203.11%20%7C%203.12-blue)">
+        <img alt="Python" src="https://img.shields.io/badge/python-3.6%20%7C%203.7%20%7C%203.8%20%7C%203.9%20%7C%203.10%20%7C%203.11%20%7C%203.12-blue">
     </a>
     <a href="https://www.python.org/dev/peps/pep-0008/" align="center">
         <img alt="PEP8" src="https://img.shields.io/badge/PEP8-compliant-brightgreen.svg">