docs: Update README.md

README.md

@@ -10,7 +10,7 @@
 <!-- [![Stable Version](https://img.shields.io/pypi/v/bilibili-api-python?label=stable)][pypi] -->
 [![Pre-release Version](https://img.shields.io/github/v/release/Nemo2011/bilibili-api?label=pre-release&include_prereleases&sort=semver)][pypi]
 [![STARS](https://img.shields.io/github/stars/nemo2011/bilibili-api?color=yellow&label=Github%20Stars)][stargazers]
-[![Testing](https://github.com/Nemo2011/bilibili-api/actions/workflows/testing.yml/badge.svg)](https://github.com/Nemo2011/bilibili-api/actions/workflows/testing.yml)
+[![Testing](https://github.com/Nemo2011/bilibili-api/actions/workflows/testing.yml/badge.svg?branch=dev)](https://github.com/Nemo2011/bilibili-api/actions/workflows/testing.yml)
 
 **:warning: 接口可能改动，请及时更新最新版 [![Stable Version](https://img.shields.io/pypi/v/bilibili-api-python?label=stable)][pypi]**
 </div>