Add link to the new repo

Author: S7evinK

README.md

@@ -1,5 +1,7 @@
 # Dendrite
 
+## Dendrite is now maintained at [element-hq/dendrite](https://github.com/element-hq/dendrite)
+
 [![Build status](https://github.com/matrix-org/dendrite/actions/workflows/dendrite.yml/badge.svg?event=push)](https://github.com/matrix-org/dendrite/actions/workflows/dendrite.yml) [![Dendrite](https://img.shields.io/matrix/dendrite:matrix.org.svg?label=%23dendrite%3Amatrix.org&logo=matrix&server_fqdn=matrix.org)](https://matrix.to/#/#dendrite:matrix.org) [![Dendrite Dev](https://img.shields.io/matrix/dendrite-dev:matrix.org.svg?label=%23dendrite-dev%3Amatrix.org&logo=matrix&server_fqdn=matrix.org)](https://matrix.to/#/#dendrite-dev:matrix.org)
 
 Dendrite is a second-generation Matrix homeserver written in Go.