manifest: Fix syntax error
manifest: Fix syntax error

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