Merge pull request #2262 from w3c/htmlaam-popovertarget-note

Editorial: Add note about submit buttons to popovertarget comments

html-aam/index.html

@@ -13453,6 +13453,7 @@ <h4 id="att-popovertarget">`popovertarget`</h4>
                   <li>The element's implicit or explicit `popovertargetaction` is the "`auto`" state and the element is a descendant of the `popover` it is associated with.</li>
                   <!-- accessibility sibling will be defined in the ARIA specification -->
                 </ul>
+                <p class="note">A button that represents a <a data-cite="html/forms.html#concept-submit-button">submit button</a> with a [=button/form owner=] cannot invoke a popover.</p>
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           </tbody>