doc: add ci badge

gemone · gemone · commit c975d8f2e351 · 2023-05-28T11:35:56.000+08:00
diff --git a/README.md b/README.md
@@ -5,6 +5,7 @@
 [![Go Reference](https://pkg.go.dev/badge/github.com/gemone/gounter.svg)](https://pkg.go.dev/github.com/gemone/gounter)
 [![Go Report](https://goreportcard.com/badge/github.com/gemone/gounter)](https://goreportcard.com/report/github.com/gemone/gounter)
 [![GitHub](https://img.shields.io/github/license/gemone/gounter)](https://github.com/gemone/gounter/blob/main/LICENSE)
+[![CI](https://github.com/gemone/gounter/actions/workflows/test.yml/badge.svg)](https://github.com/gemone/gounter/actions/workflows/test.yml)
 
 
 Go counter.
