fix GitHub Actions badge on README.md

README.md

@@ -1,7 +1,7 @@
 # pseudo-boolean
 Haskell library for parsing/generating OPB/WBO files used in pseudo boolean competition.
 
-[![Build Status](https://github.com/msakai/pseudo-boolean/workflows/build/badge.svg)](https://github.com/msakai/pseudo-boolean/actions)
+[![Build Status](https://github.com/msakai/pseudo-boolean/actions/workflows/build.yaml/badge.svg)](https://github.com/msakai/pseudo-boolean/actions/workflows/build.yaml)
 [![Coverage Status](https://coveralls.io/repos/msakai/pseudo-boolean/badge.svg)](https://coveralls.io/r/msakai/pseudo-boolean)
 [![Hackage](https://img.shields.io/hackage/v/pseudo-boolean.svg)](https://hackage.haskell.org/package/pseudo-boolean)
 [![Hackage Deps](https://img.shields.io/hackage-deps/v/pseudo-boolean.svg)](https://packdeps.haskellers.com/feed?needle=pseudo-boolean)