Update CONTRIBUTING.md

Update step one to be opening a discussion rather than an issue

docs/CONTRIBUTING.md

@@ -41,7 +41,7 @@ Looking to contribute? Great! Here's how you can help:
 
 We welcome pull requests. Before submitting one, please:
 
-1. Discuss your idea or issue in the [issues section](https://github.com/open-webui/open-webui/issues).
+1. Open a discussion regarding your ideas [here](https://github.com/open-webui/open-webui/discussions/new/choose).
 2. Follow the project's coding standards and include tests for new features.
 3. Update documentation as necessary.
 4. Write clear, descriptive commit messages.