Docs: Broken link

[ynden]

Expected Behavior

In the docs, when clicking on "Help us by improving this page", it should redirect to a page when the user can fork the project and edit it.

Actual Behavior

When clicking on "Help us by improving this page", it redirects to an 404 page.

Steps to Reproduce the Problem

1. Go to https://restsharp.dev/api/RestSharp.Serializers.Utf8Json.html#class-utf8jsonserializer
2. Scroll to the bottom
3. Click on "Help us improving this page"