Update Discord link (#338)

* Update README.md

README.md

@@ -2,7 +2,7 @@
 
 [![Documentation Status](https://readthedocs.org/projects/learning-at-home/badge/?version=latest)](https://learning-at-home.readthedocs.io/en/latest/?badge=latest)
 [![PyPI version](https://img.shields.io/pypi/v/hivemind.svg)](https://pypi.org/project/hivemind/)
-[![Discord](https://img.shields.io/static/v1?style=default&label=Discord&logo=discord&message=join)](https://discord.gg/xC7ucM8j)
+[![Discord](https://img.shields.io/static/v1?style=default&label=Discord&logo=discord&message=join)](https://discord.gg/uGugx9zYvN)
 [![CI status](https://github.com/learning-at-home/hivemind/actions/workflows/run-tests.yml/badge.svg?branch=master)](https://github.com/learning-at-home/hivemind/actions)
 ![Codecov](https://img.shields.io/codecov/c/github/learning-at-home/hivemind)
 [![Black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
@@ -84,7 +84,7 @@ of [Go toolchain](https://golang.org/doc/install) (1.15 or higher).
   at [learning-at-home.readthedocs.io](https://learning-at-home.readthedocs.io)
 
 If you have any questions about installing and using hivemind, you can ask them in
-[our Discord chat](https://discord.gg/xC7ucM8j) or file an [issue](https://github.com/learning-at-home/hivemind/issues).
+[our Discord chat](https://discord.gg/uGugx9zYvN) or file an [issue](https://github.com/learning-at-home/hivemind/issues).
 
 ## Contributing