docs: change build badge source (#1847)

README.md

@@ -134,8 +134,8 @@ Everything inside this repository is [MIT licensed](./LICENSE).
 
 <!-- badges -->
 
-[build-badge]: https://img.shields.io/circleci/project/github/react-native-community/cli/master.svg?style=flat-square
-[build]: https://circleci.com/gh/react-native-community/cli/tree/master
+[build-badge]: https://img.shields.io/github/actions/workflow/status/react-native-community/cli/test.yml?branch=main&style=flat-square
+[build]: https://github.com/react-native-community/cli/actions/workflows/test.yml
 [version-badge]: https://img.shields.io/npm/v/@react-native-community/cli.svg?style=flat-square
 [package]: https://www.npmjs.com/package/@react-native-community/cli
 [license-badge]: https://img.shields.io/npm/l/@react-native-community/cli.svg?style=flat-square