message: docs: fix GitHub links
  Provide the correct link for `Creating a pull request from a fork`
  Switch from `help.github.com` to the newer `docs.github.com`
diff: @@ -82,6 +82,6 @@ following documentation from the GitHub website:
  [mdx]: https://mdxjs.com/getting-started
  [how-to-fork-and-pr]: https://jarv.is/notes/how-to-pull-request-fork-github/
  [working-with-forks]:
  - https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/working-with-forks
  + https://docs.github.com/en/free-pro-team@latest/github/collaborating-with-issues-and-pull-requests/working-with-forks
  [creating-a-pull-request]:
  - https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/working-with-forks
  + https://docs.github.com/en/free-pro-team@latest/github/collaborating-with-issues-and-pull-requests/creating-a-pull-request-from-a-fork
  