Resolve "Move tagging to episode 10"

Closes #4

See merge request hifis/hifis-workshops/introduction-to-git-and-gitlab/workshop-material!4

Resolve "Episode 8: Use two separate commits for the changes on the branch (new info + improve line 1)."

Closes #2

See merge request hifis/hifis-workshops/introduction-to-git-and-gitlab/workshop-material!3

Tune collaboration episode

Closes #3

See merge request hifis/hifis-workshops/introduction-to-git-and-gitlab/workshop-material!2

Resolve "Rework episode 9 (conflicts)"

Closes #1

See merge request hifis/hifis-workshops/introduction-to-git-and-gitlab/workshop-material!1