graphics/gimp3-app: update to 3.0.8 release (+)
Micro releases like 3.0.8 are focused on fixing bugs and regressions.
Release notes: https://www.gimp.org/news/2026/01/24/gimp-3-0-8-released/
Changelog: https://gitlab.gnome.org/GNOME/gimp/-/blob/01df768b6756a04ecfaa410156f23ee95b3085e9/NEWS