Add project avatar to https://gitlab.gnome.org/GNOME/evolution/
On the top left of https://gitlab.gnome.org/GNOME/gnome-calendar there is an icon (avatar) for gnome-calendar.
https://docs.gitlab.com/ee/user/project/settings/ describes how to add an icon in gitlab to projects.
- Add the evolution icon (hicolor_apps_scalable_evolution.svg) as avatar to https://gitlab.gnome.org/GNOME/evolution/.