Fix badges in the readme of subtree packages (#1984)

Author: stof

README.md

@@ -1,7 +1,7 @@
 # AsyncAws Core
 
-![](https://github.com/async-aws/core/workflows/Tests/badge.svg?branch=master)
-![](https://github.com/async-aws/core/workflows/BC%20Check/badge.svg?branch=master)
+![CI](https://github.com/async-aws/core/actions/workflows/ci.yml/badge.svg?branch=master)
+![BC Check](https://github.com/async-aws/core/actions/workflows/checks.yml/badge.svg?branch=master)
 
 The repository contains shared classes between all AWS services. It also contains
 the STS client to handle authentication.