[minor] Update build badge URI

See badges/shields#8671

README.md

@@ -2,7 +2,7 @@
 
 <img src="https://user-images.githubusercontent.com/1189580/172797197-9aa46561-cfaa-4046-bd60-f681d85b055d.png" align="right" height=140>
 
-[![Build](https://img.shields.io/github/workflow/status/tasts-robots/pink/CI)](https://github.com/tasts-robots/pink/actions)
+[![Build](https://img.shields.io/github/actions/workflow/status/tasts-robots/pink/main.yml?branch=master)](https://github.com/tasts-robots/pink/actions)
 [![Coverage](https://coveralls.io/repos/github/tasts-robots/pink/badge.svg?branch=master)](https://coveralls.io/github/tasts-robots/pink?branch=master)
 [![Documentation](https://img.shields.io/badge/docs-online-brightgreen?logo=read-the-docs&style=flat)](https://tasts-robots.org/doc/pink/)
 [![PyPI version](https://img.shields.io/pypi/v/pin-pink)](https://pypi.org/project/pin-pink/)