docs: Fix typo in ClutterStage::deactivate
docs: Fix typo in ClutterStage::deactivate

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