doc link fixes

framework/base/ActionFilter.php

@@ -11,7 +11,7 @@ namespace yii\base;
  * ActionFilter provides a base implementation for action filters that can be added to a controller
  * to handle the `beforeAction` event.
  *
- * Check implementation of [[AccessControl]], [[PageCache]] and [[HttpCache]] as examples on how to use it.
+ * Check implementation of [[\yii\web\AccessControl]], [[\yii\web\PageCache]] and [[\yii\web\HttpCache]] as examples on how to use it.
  *
  * @author Qiang Xue <qiang.xue@gmail.com>
  * @since 2.0