Update src/Gestures/GestureTracker.vala

Co-authored-by: Leo <[email protected]>

Author: leolost2605

src/Gestures/GestureTracker.vala

@@ -88,7 +88,7 @@ public class Gala.GestureTracker : Object {
 
     /**
      * @param percentage Value between 0 and 1.
-     * @param completions How often a full cycle of the gesture was completed in this go. Can be
+     * @param completions The number of times a full cycle of the gesture was completed in this go. Can be
      * negative if the gesture was started in one direction but ended in the other. This is used to update
      * the UI to the according state. 0 for example means that the UI should go back to the same state
      * it was in before the gesture started.