I retried and…
Partly working: the note was shortened a bit too much (71 characters) from the original:
We’ve been waiting for it: now thanks to Angus McLeod and the pavilion team, as well as CDCK, Inc. the company behind #Discourse, the #SocialHub is now federated! You can follow @fediverse@socialhub.activitypub.rocks for general announcements, and @feps@socialhub.activitypub.rocks for Fediverse Enhancement Proposals.
