Update homepage/source code links for GNU Social (#3965)

README.md

@@ -550,7 +550,7 @@ Simple deployment of [E-mail](https://en.wikipedia.org/wiki/Email) servers, e.g.
 - [Flarum](https://flarum.org) - Delightfully simple forums. Flarum is the next-generation forum software that makes online discussion fun again. ([Source Code](https://github.com/flarum/flarum)) `MIT` `PHP`
 - [FlaskBB](https://flaskbb.org/) - FlaskBB is forum software written in Python using the microframework Flask. You can easily create new topics, posts and send other users private messages. It also includes basic administration and moderation tools. ([Source Code](https://github.com/flaskbb/flaskbb)) `BSD-3-Clause` `Python`
 - [Friendica](https://friendi.ca/) - Social Communication Server. ([Source Code](https://github.com/friendica/friendica)) `AGPL-3.0` `PHP`
-- [GNU social](https://gnu.io/social/) - Social communication software for both public and private communications. ([Source Code](https://notabug.org/diogo/gnu-social)) `AGPL-3.0` `PHP`
+- [GNU social](https://www.gnusocial.rocks/) - Social communication software for both public and private communications. ([Source Code](https://codeberg.org/GNUsocial/gnu-social)) `AGPL-3.0` `PHP`
 - [GoToSocial](https://github.com/superseriousbusiness/gotosocial) - ActivityPub federated social network server implementing the Mastodon client API. `AGPL-3.0` `Docker/Go`
 - [Hubzilla](https://hubzilla.org) - Decentralized identity, privacy, publishing, sharing, cloud storage, and communications/social platform. ([Source Code](https://framagit.org/hubzilla/core)) `MIT` `PHP`
 - [HumHub](https://www.humhub.org/) - Flexible kit for private social networks. ([Source Code](https://github.com/humhub/humhub)) `AGPL-3.0` `PHP`