Update README.md with note about itkit-pekko

As already done in the other repository.

README.md

@@ -1,4 +1,4 @@
-# scala-itkit
+# scala-itkit for Akka
 
 ![Build & Test](https://github.com/moia-oss/itkit/workflows/Build%20&%20Test/badge.svg)
 [![Scala 2.13](https://img.shields.io/maven-central/v/io.moia/itkit_2.13.svg)](https://search.maven.org/search?q=itkit_2.13)
@@ -8,6 +8,8 @@ This framework aims towards reduction of boilerplate produced during development
 traits which can be mixed into your suite classes providing a process running your application and an akka-http client
 which can be used for sending requests to the server instance.
 
+**If you are using Pekko instead of Akka, take a look at [scala-itkit for Pekko](https://github.com/moia-oss/itkit-pekko/).**
+
 ## Release
 
 [Tag](https://github.com/moia-oss/itkit/tags) the new version (e.g. `v3.0.0`) and push the tags (`git push origin --tags`).