Addons run in a docker container and all dependencies are included.
The list you see is the changes that come with the update, so yamllint and home-assistant/cli is updated when you install the updated addon.
What you see here, under the title “What’s changed”, is the so called changelog. Changelogs are written by the developers to inform you, what has changed, if anything is to take care of before or after the update and if new features are added.