Correct RenderingContext typedef

It needs to list ImageBitmapRenderingContext.

Missed in #1028.

Author: annevk

source

@@ -59130,9 +59130,9 @@ dictionary <dfn>AssignedNodesOptions</dfn> {
    <dd><span>Global attributes</span></dd>
    <dd><code data-x="attr-canvas-width">width</code></dd>
    <dd><code data-x="attr-canvas-height">height</code></dd>
-   <dt><span data-x="concept-element-dom">DOM interface</span>:</dt><!--ADD-TOPIC:DOM APIs-->
+   <dt><span data-x="concept-element-dom">DOM interface</span>:</dt>
    <dd w-nodev>
-    <pre class="idl">typedef (<span>CanvasRenderingContext2D</span> or <span>WebGLRenderingContext</span>) <dfn>RenderingContext</dfn>;
+    <pre class="idl">typedef (<span>CanvasRenderingContext2D</span> or <span>ImageBitmapRenderingContext</span> or <span>WebGLRenderingContext</span>) <dfn>RenderingContext</dfn>;
 
 [Exposed=Window,
  <span>HTMLConstructor</span>]
@@ -59150,7 +59150,7 @@ interface <dfn>HTMLCanvasElement</dfn> : <span>HTMLElement</span> {
 callback <dfn>BlobCallback</dfn> = void (<span>Blob</span>? blob);</pre>
    </dd>
    <dd w-nohtml>Uses <code>HTMLCanvasElement</code>.</dd>
-  </dl><!--REMOVE-TOPIC:DOM APIs-->
+  </dl>
 
   <p>The <code>canvas</code> element provides scripts with a resolution-dependent bitmap canvas,
   which can be used for rendering graphs, game graphics, art, or other visual images on the fly.</p>