Add a Discord badge that can be used to connect to the server. Link
taken from daxtens' email to the list about the server [1].
[1] https://lists.ozlabs.org/pipermail/patchwork/2021-September/007226.html
Signed-off-by: Stephen Finucane <stephen@that.guru>
Cc: Daniel Axtens <dja@axtens.net>
[dja: change badge url to get users from the PW discord, not another
mystery discord. Also, enable the PW discord to report its status
via badges.]
Signed-off-by: Daniel Axtens <dja@axtens.net>
:target: http://patchwork.readthedocs.io/en/latest/?badge=latest
:alt: Documentation Status
+.. image:: https://img.shields.io/discord/857116373653127208.svg?label=&logo=discord&logoColor=ffffff&color=7389D8&labelColor=6A7EC2
+ :target: https://discord.gg/hGWjXVTAbB
+ :alt: Discord
+
**Patchwork** is a patch tracking system for community-based projects. It is
intended to make the patch management process easier for both the project's
contributors and maintainers, leaving time for the more important (and more