Fix leak in flatpak-installed-ref
Fix leak in flatpak-installed-ref

The latest_commit string needs to be freed.

GeorgesStavracas/flatpak,matthiasclasen/flatpak,matthiasclasen/flatpak,matthiasclasen/flatpak,flatpak/flatpak,matthiasclasen/flatpak,handsome-feng/flatpak,matthiasclasen/flatpak,handsome-feng/flatpak,GeorgesStavracas/flatpak,GeorgesStavracas/flatpak,handsome-feng/flatpak,flatpak/flatpak,GeorgesStavracas/flatpak,flatpak/flatpak,handsome-feng/flatpak,flatpak/flatpak,amigadave/flatpak,handsome-feng/flatpak,amigadave/flatpak,GeorgesStavracas/flatpak,flatpak/flatpak,amigadave/flatpak,amigadave/flatpak