Change the slide on connecting the repo with remote to correspond to the GitLab suggestions

[theFeu]

Push an existing Git repository

cd existing_repo
git remote rename origin old-origin
git remote add origin https://11697-gitlab-0b092-web.nws.netways.de/gitlab-instance-249a55c0/training.git
git push -u origin --all
git push -u origin --tags

[martialblog]

Fixed in #185