Update shield URL

Readme.md

@@ -345,7 +345,7 @@ MIT
 [npm-url]: https://npmjs.org/package/path-to-regexp
 [downloads-image]: https://img.shields.io/npm/dm/path-to-regexp
 [downloads-url]: https://npmjs.org/package/path-to-regexp
-[build-image]: https://img.shields.io/github/workflow/status/pillarjs/path-to-regexp/CI/master
+[build-image]: https://img.shields.io/github/actions/workflow/status/pillarjs/path-to-regexp/ci.yml?branch=master
 [build-url]: https://github.com/pillarjs/path-to-regexp/actions/workflows/ci.yml?query=branch%3Amaster
 [coverage-image]: https://img.shields.io/codecov/c/gh/pillarjs/path-to-regexp
 [coverage-url]: https://codecov.io/gh/pillarjs/path-to-regexp