Update README.md

fix ci link

Author: tao-guo

README.md

@@ -5,7 +5,7 @@
 Common rust command-line macros and utilities, to write shell-script like tasks
 easily in rust programming language. Available at [crates.io](https://crates.io/crates/cmd_lib).
 
-[![Build status](https://github.com/rust-shell-script/rust_cmd_lib/workflows/ci/badge.svg)](https://github.com/rust-shell-script/rust_cmd_lib/actions)
+[![Build status](https://github.com/rust-shell-script/rust_cmd_lib/actions/workflows/ci/badge.svg)](https://github.com/rust-shell-script/rust_cmd_lib/actions)
 [![Crates.io](https://img.shields.io/crates/v/cmd_lib.svg)](https://crates.io/crates/cmd_lib)
 [![Packaging status](https://repology.org/badge/tiny-repos/cmd_lib.svg)](https://repology.org/project/cmd_lib/badges)