add link for simultaneous interpretation in jitsi

howto/conference.md

@@ -320,6 +320,8 @@ there's also a docker container and (messy) debian packages
 
 prometheus exporter: https://github.com/systemli/prometheus-jitsi-meet-exporter
 
+Mayfirst is testing a [patch for simultaneous interpretation](https://current.workingdirectory.net/posts/2021/jitsi-and-language-justice/).
+
 ### Nextcloud Talk
 
 systemli is using this ansible role to install coturn: https://github.com/systemli/ansible-role-coturn