Update badge url (#322)

Author: andreschaffer

README.md

@@ -1,4 +1,4 @@
-![Build](https://github.com/andreschaffer/http-caching-and-concurrency-examples/workflows/Build/badge.svg)
+[![Build](https://github.com/andreschaffer/http-caching-and-concurrency-examples/actions/workflows/build.yml/badge.svg)](https://github.com/andreschaffer/http-caching-and-concurrency-examples/actions/workflows/build.yml)
 [![Test Coverage](https://api.codeclimate.com/v1/badges/89fa44901c04343aa6a7/test_coverage)](https://codeclimate.com/github/andreschaffer/http-caching-and-concurrency-examples/test_coverage)
 [![Maintainability](https://api.codeclimate.com/v1/badges/89fa44901c04343aa6a7/maintainability)](https://codeclimate.com/github/andreschaffer/http-caching-and-concurrency-examples/maintainability)
 [![Dependabot](https://img.shields.io/badge/Dependabot-enabled-blue?logo=dependabot)](https://docs.github.com/en/github/administering-a-repository/keeping-your-dependencies-updated-automatically)