Display build status badge from drone.join-lemmy.org (#2564)

Co-authored-by: Dessalines <dessalines@users.noreply.github.com>

README.md

@@ -1,7 +1,7 @@
 <div align="center">
 
 ![GitHub tag (latest SemVer)](https://img.shields.io/github/tag/LemmyNet/lemmy.svg)
-[![Build Status](https://cloud.drone.io/api/badges/LemmyNet/lemmy/status.svg)](https://cloud.drone.io/LemmyNet/lemmy/)
+[![Build Status](https://drone.join-lemmy.org/api/badges/LemmyNet/lemmy/status.svg)](https://drone.join-lemmy.org/LemmyNet/lemmy/)
 [![GitHub issues](https://img.shields.io/github/issues-raw/LemmyNet/lemmy.svg)](https://github.com/LemmyNet/lemmy/issues)
 [![Docker Pulls](https://img.shields.io/docker/pulls/dessalines/lemmy.svg)](https://cloud.docker.com/repository/docker/dessalines/lemmy/)
 [![Translation status](http://weblate.yerbamate.ml/widgets/lemmy/-/lemmy/svg-badge.svg)](http://weblate.yerbamate.ml/engage/lemmy/)