Complete machine-readable scope of and event dfns

The summary table correctly lists `CloseWatcher` (for `cancel` and `close`) and
`MessagePort` (for `close`) as target interfaces for the event, but these
interfaces are missing from the machine-readable `for` attribute.

Via w3c/webref#1212 (comment)

source

@@ -141878,7 +141878,7 @@ INSERT INTERFACES HERE
      <td> Fired at nodes when they stop being <span>focused</span>
 
     <tr> <!-- cancel -->
-     <td> <dfn event for="HTMLElement"><code data-x="event-cancel">cancel</code></dfn>
+     <td> <dfn event for="CloseWatcher,HTMLElement"><code data-x="event-cancel">cancel</code></dfn>
      <td> <code>Event</code>
      <td> <code>CloseWatcher</code>, <code>dialog</code> elements, <code>input</code> elements
      <td> Fired at <code>CloseWatcher</code> objects or <code>dialog</code> elements when they receive a <span>close request</span>, or at <code>input</code> elements in the <span data-x="attr-input-type-file">File</span> state when the user does not change their selection
@@ -141896,7 +141896,7 @@ INSERT INTERFACES HERE
      <td> Normally a mouse event; also synthetically fired at an element before its <span>activation behavior</span> is run, when an element is activated from a non-pointer input device (e.g. a keyboard)
 
     <tr> <!-- close -->
-     <td> <dfn event for="HTMLElement"><code data-x="event-close">close</code></dfn>
+     <td> <dfn event for="CloseWatcher,HTMLElement,MessagePort"><code data-x="event-close">close</code></dfn>
      <td> <code>Event</code>
      <td> <code>CloseWatcher</code>, <code>dialog</code> elements, <code>MessagePort</code>
      <td> Fired at <code>CloseWatcher</code> objects or <code>dialog</code> elements when they are closed via a <span>close request</span> or via web developer code, or at <code>MessagePort</code> objects when <span data-x="disentangle">disentangled</span>