Update README.md

Author: snnbyyds

README.md

@@ -17,6 +17,12 @@
 * Zca extension, v1.0
 * Zcd extension, v1.0
 
+## Continuous Integration Status
+
+| Status (main) | Description |
+| :-----------: | :---------: |
+| [![build status](https://github.com/Uotan-Dev/uotan_riscv_emu/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/Uotan-Dev/uotan_riscv_emu/actions/workflows/ci.yml?query=branch%3Amain) | Build and Package |
+
 ## Boot Demo
 ### [Alpine Linux v3.22](https://www.alpinelinux.org/)
 ![Booting Alpine Linux on uemu](./software/alpine.png)