Ah yes, in that case it makes sense to have the release notes link to the event. And if l the 🧲 URL is in the release notes that's a nice fallback.
i've experimented a bit with nostr: URLs in the markdown, but this embedding doesn't seem to be handled great in clients (nostrudel generates a unusable link back to itself, habla keeps the nostr: link assuming that the browser will handle it...) even though NIP-23 explicitly mentions this so yes, putting in the magnet URL directly makes more sense for now