update readme

Author: vanvoorden

README.md

@@ -1,5 +1,8 @@
 # ImmutableData-Legacy 0.3.0
 
+[![Builds](https://github.com/Swift-ImmutableData/ImmutableData-Legacy/actions/workflows/builds.yml/badge.svg?branch=main)](https://github.com/Swift-ImmutableData/ImmutableData-Legacy/actions/workflows/builds.yml)
+[![Tests](https://github.com/Swift-ImmutableData/ImmutableData-Legacy/actions/workflows/tests.yml/badge.svg?branch=main)](https://github.com/Swift-ImmutableData/ImmutableData-Legacy/actions/workflows/tests.yml)
+
 Easy State Management for Legacy SwiftUI Apps
 
 ## Background