"Contributing" link is broken
🐞 Bug Report
The link to "Contributing" in the project README leads to missing page (error 404):
https://gitlab.torproject.org/tpo/applications/tor-browser/-/blob/295f72d1/README.md?plain=1#L6
Reproduction steps
Click on the "Contributing" link in the README.
Expected behaviour
It should lead to a page with instructions for contributing.
Actual behaviour
It leads to a page which does not exist.
Additional Notes
The main reason I'm looking for this page is that I want to figure out how to send patches.
I tried clicking on the "Fork" button on the project page, but that shows me an error:
Limit reached You've reached your limit of 5 projects created. Contact your GitLab administrator.
I thought this might refer to projects that I own as a user, but I only have a single repository (which is pending deletion).