Follow up on OS PR (github#27153)

Author: felicitymay

content/get-started/quickstart/github-glossary.md

@@ -22,5 +22,5 @@ versions:
 ## Further reading
 
 - [The Official Git Glossary](https://www.kernel.org/pub/software/scm/git/docs/gitglossary.html)
-- [Git Reference](http://gitref.org/)
-- [Git SCM](https://git-scm.com/doc)
+- [Git documentation](https://git-scm.com/doc)
+- [Git command list](https://git-scm.com/docs)