Move period inside quotations in about-forks#forking-a-repository-versus-duplicating-a-repository

[nguyenalex836]

Code of Conduct

• I have read and agree to the GitHub Docs project's Code of Conduct

What article on docs.github.com is affected?

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/about-forks#forking-a-repository-versus-duplicating-a-repository

This issue is intended for newcomers to the OS Docs repo! 💛

If you are veteran of the OS Docs repo and are looking for issues to work on, take a look at our help wanted section ✨

What part(s) of the article would you like to see updated?

For more information, see "Duplicating a repository" and "Creating a repository from a template".

Move periods inside quotation marks to maintain consistency with other docs (and style guide)

Additional information

No response