add changes to remote git code example

Example 1: git add remote

$ git remote add origin https://github.com/user/repo.git
# Set a new remote

$ git remote -v
# Verify new remote
> origin  https://github.com/user/repo.git (fetch)
> origin  https://github.com/user/repo.git (push)

Example 2: git set remote

git remote set-url origin https://github.com/USERNAME/REPOSITORY.git