fix a link for audio section in 11-bind.md

Author: tomoam

documentation/docs/03-template-syntax/11-bind.md

@@ -235,7 +235,7 @@ You can give the `<select>` a default value by adding a `selected` attribute to
 
 ## `<video>`
 
-`<video>` elements have all the same bindings as [#audio] elements, plus readonly [`videoWidth`](https://developer.mozilla.org/en-US/docs/Web/API/HTMLVideoElement/videoWidth) and [`videoHeight`](https://developer.mozilla.org/en-US/docs/Web/API/HTMLVideoElement/videoHeight) bindings.
+`<video>` elements have all the same bindings as [`<audio>`](#audio) elements, plus readonly [`videoWidth`](https://developer.mozilla.org/en-US/docs/Web/API/HTMLVideoElement/videoWidth) and [`videoHeight`](https://developer.mozilla.org/en-US/docs/Web/API/HTMLVideoElement/videoHeight) bindings.
 
 ## `<img>`