Add link to Zulip channel

Author: SylvainCorlay

README.md

@@ -3,7 +3,7 @@
 [![Documentation Status](https://readthedocs.org/projects/xeus-sqlite/badge/?version=latest)](https://xeus-sqlite.readthedocs.io/en/latest/?badge=latest)
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/jupyter-xeus/xeus-sqlite/stable?filepath=examples/Simple%20operations.ipynb)
 [![lite-badge](https://jupyterlite.rtfd.io/en/latest/_static/badge.svg)](https://jupyter-xeus.github.io/xeus-sqlite/lab/index.html?path=Simple+operations.ipynb)
-
+[![Zulip](https://img.shields.io/badge/social_chat-zulip-blue.svg)](https://jupyter.zulipchat.com/#narrow/channel/539737-Jupyter-Kernels)
 
 `xeus-sqlite` is a Jupyter kernel for SQL based on the native implementation of the Jupyter protocol [xeus](https://github.com/jupyter-xeus/xeus).