The org link at Ecma TC39 ยท GitHub currently links to https://www.ecma-international.org/memento/tc39-rf-tg.htm, which doesn't have much useful content.
It would be better to link to https://tc39.es, and that page can link to https://www.ecma-international.org/memento/tc39-rf-tg.htm somewhere in it.
This will make these forums more discoverable, etc.