docs(README): add link to Zulip chat

Author: NTBBloodbath

README.md

@@ -5,6 +5,7 @@
 # Neorg - An Organized Future
 
 <a href="https://neovim.io"> ![Neovim](https://img.shields.io/badge/Neovim%200.10+-brightgreen?style=for-the-badge) </a>
+<a href="https://chat.neorg.org"> ![Zulip](https://img.shields.io/badge/zulip-join-6492fe?style=for-the-badge&logo=zulip) </a>
 <a href="https://discord.gg/T6EgTAX7ht"> ![Discord](https://img.shields.io/badge/discord-join-7289da?style=for-the-badge&logo=discord) </a>
 <a href="/LICENSE"> ![License](https://img.shields.io/badge/license-GPL%20v3-brightgreen?style=for-the-badge)</a>
 <a href="https://dotfyle.com/plugins/nvim-neorg/neorg"> ![Usage](https://dotfyle.com/plugins/nvim-neorg/neorg/shield?style=for-the-badge) </a>