Fix dead link for change event in API docs

src/ol/events.js

@@ -11,7 +11,7 @@ goog.require('ol.object');
  */
 ol.events.EventType = {
   /**
-   * Generic change event.
+   * Generic change event. Triggered when the revision counter is increased.
    * @event ol.events.Event#change
    * @api
    */

src/ol/observable.js

@@ -15,7 +15,7 @@ goog.require('ol.events.EventType');
  *
  * @constructor
  * @extends {ol.events.EventTarget}
- * @fires change
+ * @fires ol.events.Event
  * @struct
  * @api stable
  */
@@ -60,13 +60,6 @@ ol.Observable.prototype.changed = function() {
 };
 
 
-/**
- * Triggered when the revision counter is increased.
- * @event change
- * @api
- */
-
-
 /**
  * Dispatches an event and calls all listeners listening for events
  * of this type. The event parameter can either be a string or an