Post-release version bump to 1.23.5
Post-release version bump to 1.23.5

jigpu/clutter,GNOME/clutter,jigpu/clutter,Distrotech/clutter,Distrotech/clutter,jigpu/clutter,GNOME/clutter,GNOME/clutter,jigpu/clutter,Distrotech/clutter,GNOME/clutter,jigpu/clutter,GNOME/clutter,jigpu/clutter,Distrotech/clutter,Distrotech/clutter,Distrotech/clutter