Update Libervia (add Fedi account)

Watchlist-for-ActivityPub-developer-resources.md

@@ -114,7 +114,7 @@
 
 * :heavy_check_mark: [**Kazarma**](https://gitlab.com/kazarma/kazarma/): A Matrix bridge to ActivityPub. `AGPL-3.0, Elixir`
 
-* :black_nib: [**Libervia**](https://repos.goffi.org/sat/file/tip) ([site](https://salut-a-toi.org/)): An XMPP <=> ActivityPub gateway project doubled with XMPP Pubsub end-to-end encryption `AGPL-3.0, Python`
+* :black_nib: [**Libervia**](https://repos.goffi.org/sat/file/tip) ([site](https://salut-a-toi.org/), [Fedi account](https://mastodon.social/@Goffi)): An XMPP <=> ActivityPub gateway project doubled with XMPP Pubsub end-to-end encryption `AGPL-3.0, Python`
 
 * :heavy_check_mark: [**ligh7hau5**](https://github.com/vulet/ligh7hau5): A Matrix to Fediverse / ActivityPub client / bridge. Also, some media proxying. `GPL-3.0, Javascript`