fixed typo in the description (#30927)

Author: notgod6

docs/examples/en/controls/ArcballControls.html

@@ -16,7 +16,7 @@ <h1>[name]</h1>
 		Cursor/finger positions and movements are mapped over a virtual trackball surface
 		represented by a gizmo and mapped in intuitive and consistent camera movements.
 		Dragging cursor/fingers will cause camera to orbit around the center of the trackball in a conservative way (returning to the starting point
-		will make the camera to return to its starting orientation).<br><br>
+		will make the camera return to its starting orientation).<br><br>
 
 		In addition to supporting pan, zoom and pinch gestures, Arcball controls provide <i>focus</i> functionality with a double click/tap for
 		intuitively moving the object's point of interest in the center of the virtual trackball.