Update contributing.md

Author: badmonster0

docs/docs/about/contributing.md

@@ -17,7 +17,7 @@ We tag issues with the ["good first issue"](https://github.com/cocoindex-io/coco
 
 ## How to Contribute 
 - If you decide to work on an issue, we recommend you to comment on the issue **`I'm working on it`** to helping other contributors avoid duplicating work.
-- Our [discord server](https://discord.com/invite/zpA9S2DR7s) are constantly open. If you are unsure about anything, either leaving a message under an issue or asking in the discord server will work!
+- Our [discord server](https://discord.com/invite/zpA9S2DR7s) are constantly open. If you are unsure about anything, either leaving a message under a issue or asking in the discord server will work!
 
 ## Start hacking! Setting Up Development Environment 
 Following the steps below to get cocoindex build on latest codebase locally - if you are making changes to cocoindex funcionality and want to test it out.