click-action: Fix the release() method name

Documented and declared as release(), it's implemented as
force_release().

http://bugzilla.clutter-project.org/show_bug.cgi?id=2286

clutter/clutter-click-action.c

@@ -316,7 +316,7 @@ clutter_click_action_new (void)
  * Since: 1.4
  */
 void
-clutter_click_action_force_release (ClutterClickAction *action)
+clutter_click_action_release (ClutterClickAction *action)
 {
   ClutterClickActionPrivate *priv;