correct wrong link (#1661)

* Update events.md

correct wrong link

* Update events.md

correct wrong link

Author: byog

src/v2/guide/events.md

@@ -204,7 +204,7 @@ To address this problem, Vue provides **event modifiers** for `v-on`. Recall tha
 <a v-on:click.once="doThis"></a>
 ```
 
-Unlike the other modifiers, which are exclusive to native DOM events, the `.once` modifier can also be used on [component events](components.html#Using-v-on-with-Custom-Events). If you haven't read about components yet, don't worry about this for now.
+Unlike the other modifiers, which are exclusive to native DOM events, the `.once` modifier can also be used on [component events](components-custom-events.html). If you haven't read about components yet, don't worry about this for now.
 
 > New in 2.3.0+