Add link to samber/ro in README

Author: samber

README.md

@@ -18,6 +18,7 @@
 
 **See also:**
 
+- [samber/ro](https://github.com/samber/ro): Reactive Programming for Go: declarative and composable API for event-driven applications
 - [samber/lo](https://github.com/samber/lo): A Lodash-style Go library based on Go 1.18+ Generics
 - [samber/do](https://github.com/samber/do): A dependency injection toolkit based on Go 1.18+ Generics