manifest: gjs now uses js17
manifest: gjs now uses js17

chergert/gnome-continuous,vrutkovs/vrutkovs.github.io,GNOME/gnome-ostree,GNOME/gnome-ostree,GNOME/gnome-ostree,chergert/gnome-continuous,djdeath/gnome-ostree,djdeath/gnome-ostree,vrutkovs/vrutkovs.github.io,chergert/gnome-continuous,vrutkovs/vrutkovs.github.io,djdeath/gnome-ostree