iox-#2272 Update release notes

Author: elBoberido

doc/website/release-notes/iceoryx-unreleased.md

@@ -63,6 +63,7 @@
 - Add support for `iox::string` in `MessageQueue` and created `message_queue.inl` [#1963](https://github.com/eclipse-iceoryx/iceoryx/issues/1963)
 - Add support for `iox::string` in `NamedPipe` and created `named_pipe.inl` [#1693](https://github.com/eclipse-iceoryx/iceoryx/issues/1693)
 - Add an `iox1` prefix to all resources created by `iceoryx_posh` and `RouDi` [#2185](https://github.com/eclipse-iceoryx/iceoryx/issues/2185)
+- Make iceoryx resource prefix a compile time option [#2272](https://github.com/eclipse-iceoryx/iceoryx/issues/2272)
 
 **Bugfixes:**