Update README.md

Author: egil

README.md

@@ -36,6 +36,7 @@ To get started, head to the [getting started documentation](https://bunit.egilha
 
 A hugh thank you to the [sponsors of my work with bUnit](https://github.com/sponsors/egil). The higher tier sponsors are:
 
+- [Progress](https://github.com/progress)
 - [Hassan Rezk Habib (@hassanhabib)](https://github.com/hassanhabib)
 
 ## Milestones to v1.0.0