Project:GNOME/GNOME bumping notes

Notes on why I didn't bump outdated GNOME packages:

• app-office/abiword-docs - Don't know where v3.0.5 docs come from. I suspect a versioning mistake on another distro.
• dev-cpp/atkmm - atkmm-2.36 has no consumers.
• dev-util/gtk-update-icon-cache - Not a real upstream version - distro versioning problem.
• gnome-extra/libgda - Needs meson port.
  • Build system in pretty terrible shape. See https://gitlab.gnome.org/GNOME/libgda/-/merge_requests/198