docs: Release Announcement for PR jamulussoftware#3479 — Add JSON-RPC access to directories and server lists (without connect/disconnect methods)

Author: pljones

ReleaseAnnouncement.md

@@ -18,6 +18,7 @@ Here's what's new in the next release of Jamulus:
 - The Connect dialog on iOS now displays in full screen, fixing a severe UI issue that previously prevented users from tapping the connect button. A big thank you to [@ann0see](https://github.com/ann0see) for resolving this!
 - Changing the language on iOS no longer hangs the app, thanks to the use of a Qt::QueuedConnection for the language message box. This improvement ensures a smoother experience when switching languages. Kudos to [@ann0see](https://github.com/ann0see) for this fix!
 - The Connect dialog now includes a Version column that displays the server version for each server in the list, making it easier for you to choose the right server. Thanks to [@softins](https://github.com/softins) for this useful addition!
+- You can now poll a directory for server lists using the JSON-RPC interface, allowing for better control and monitoring of available servers. A big thank you to [@ann0see](https://github.com/ann0see) for this enhancement!
 - The bundled Qt6 has been updated to version 6.7.3, which brings various improvements and optimizations to enhance your overall experience with Jamulus.
 - The iOS app now features a new icon, making it more visually appealing and recognizable. Thanks to [@ann0see](https://github.com/ann0see) for this addition!
 - You can now sort channels in the mixer view, making it easier to manage your audio setup. A big thanks to [@pljones](https://github.com/pljones) for this useful feature!