Add CalVer badge

Author: beevelop

README.md

@@ -5,6 +5,7 @@
 ![License](https://img.shields.io/github/license/beevelop/docker-android?style=for-the-badge)
 [![GitHub release](https://img.shields.io/github/release/beevelop/docker-android.svg?style=for-the-badge)](https://github.com/beevelop/docker-android/releases)
 ![GitHub Release Date](https://img.shields.io/github/release-date/beevelop/docker-android?style=for-the-badge)
+![CalVer](https://img.shields.io/badge/CalVer-YYYY.MM.MICRO-22bfda.svg?style=for-the-badge)
 [![Beevelop](https://img.shields.io/badge/-%20Made%20with%20%F0%9F%8D%AF%20by%20%F0%9F%90%9Dvelop-blue.svg?style=for-the-badge)](https://beevelop.com)
 
 # Android 11.0