Update Lemmy source code link and site link.

README.md

@@ -449,7 +449,7 @@ _[SIP](https://en.wikipedia.org/wiki/Session_Initiation_Protocol)/[IPBX](https:/
 - [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`
 - [Isso](http://posativ.org/isso/) - Lightweight commenting server written in Python and Javascript. It aims to be a drop-in replacement for Disqus. ([Source Code](https://github.com/posativ/isso)) `MIT` `Python`
-- [Lemmy](https://join.lemmy.ml/#/) - A link aggregator / reddit clone for the fediverse. Reddit alternative built in Rust. ([Source Code](https://github.com/dessalines/lemmy)) `AGPL-3.0` `Rust`
+- [Lemmy](https://join-lemmy.org/) - A link aggregator / reddit clone for the fediverse. Reddit alternative built in Rust. ([Source Code](https://github.com/LemmyNet/lemmy)) `AGPL-3.0` `Rust`
 - [Libreddit](https://libredd.it/) `⚠` - Private front-end for Reddit written in Rust. ([Source Code](https://github.com/spikecodes/libreddit)) `AGPL-3.0` `Rust`
 - [Loomio](https://www.loomio.org/) - Loomio is a collaborative decision-making tool that makes it easy for anyone to participate in decisions which affect them. ([Source Code](https://github.com/loomio/loomio)) `AGPL-3.0` `Ruby`
 - [Mastodon](https://joinmastodon.org/) - Federated microblogging server, an alternative to GNU social. ([Source Code](https://github.com/tootsuite/mastodon)) `AGPL-3.0` `Ruby`