transaction: Don't call g_object_ref on a GBytes
transaction: Don't call g_object_ref on a GBytes

This won't go well.

Spotted while writing tests.

Closes: #2245
Approved by: alexlarsson

matthiasclasen/flatpak,flatpak/flatpak,matthiasclasen/flatpak,flatpak/flatpak,flatpak/flatpak,matthiasclasen/flatpak,flatpak/flatpak,flatpak/flatpak,matthiasclasen/flatpak,matthiasclasen/flatpak