Update Clutter version in README
Update Clutter version in README

StanciuMarius/Libchamplain-map-wrapping,GNOME/libchamplain,Distrotech/libchamplain,StanciuMarius/Libchamplain-map-wrapping,GNOME/libchamplain,Distrotech/libchamplain,StanciuMarius/Libchamplain-map-wrapping,Distrotech/libchamplain,StanciuMarius/Libchamplain-map-wrapping,StanciuMarius/Libchamplain-map-wrapping,Distrotech/libchamplain,Distrotech/libchamplain