Documentation links still point to old nexB organization #255

Problem

The "Edit on GitHub" links in the documentation are pointing to the old nexB organization instead of aboutcode-org. While GitHub redirects them automatically, it would be better to have them point to the correct place directly.

Steps to reproduce

1. Go to https://aboutcode.readthedocs.io/en/latest/
2. 2. Click the GitHub icon in the top right (or any "Edit on GitHub" link)
3. 3. Notice the URL shows github.com/nexB/aboutcode before redirecting to github.com/aboutcode-org/aboutcode

Expected behavior

The links should point directly to github.com/aboutcode-org/aboutcode without needing a redirect.

Suggested fix

Update the github_user field in docs/source/conf.py from "nexB" to "aboutcode-org".

html_context = {
    "display_github": True,
    "github_user": "aboutcode-org",  # was "nexB"
    "github_repo": "aboutcode",
    "github_version": "master",
    "conf_py_path": "/docs/source/",
}

This is a simple one-line change that fixes all the Edit on GitHub links throughout the docs.