Standardizing formatting by adding introduction to gitandrepositories.md
Standardizing formatting by adding introduction to gitandrepositories.md

* Update gitandrepositories.md

* Update gitandrepositories.md

leahphuong/leahphuong.github.io,leahphuong/leahphuong.github.io,leahphuong/leahphuong.github.io