Update README.md

Author: kez-lab

README.md

@@ -10,7 +10,7 @@
 <br/>
 <div align="center">
   <p align="center">
-    <img src="https://img.shields.io/badge/Kotlin-1.9.20-7F52FF?style=for-the-badge&logo=Kotlin&logoColor=white"/>
+    <img src="https://img.shields.io/badge/Kotlin-2.1.20-7F52FF?style=for-the-badge&logo=Kotlin&logoColor=white"/>
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
 <img src="https://img.shields.io/badge/all_contributors-3-orange.svg?style=for-the-badge"/>
 <!-- ALL-CONTRIBUTORS-BADGE:END -->