Broken link in .github/CONTRIBUTING.md

[islml]

p5.js version

Latest

What is your operating system?

None

Web browser and version

All

Actual Behavior

Clicking on "All Projects" in Project board section takes you to this 404 page: https://github.com/processing/p5.js-web-editor/projects/4

Expected Behavior

I think it should take you to this page: https://github.com/processing/p5.js-web-editor/projects?query=is%3Aopen

Steps to reproduce

Steps:

1. Go to .github/CONTRIBUTING.md
2. Go to Project Board section
3. Try clicking on "All Projects"