update README.md

Author: Nurzhan2023

README.md

@@ -34,3 +34,8 @@ make lint
 This repository is created and maintained by the team and the community of Hexlet, an educational project. [Read more about Hexlet](https://hexlet.io/?utm_source=github&utm_medium=link&utm_campaign=hexlet-ci-app).
 
 See most active contributors on [hexlet-friends](https://friends.hexlet.io/).
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+[![CI Workflow](https://github.com/Nurzhan2023/hexlet-ci-app/actions/workflows/ci.yml/badge.svg)](https://github.com/Nurzhan2023/hexlet-ci-app/actions/workflows/ci.yml)