Fix link to definition of accessibility child

index.html

@@ -11612,7 +11612,7 @@ <h2>Definitions of States and Properties (all aria-* attributes)</h2>
 		<div class="state" id="aria-expanded">
 			<sdef>aria-expanded</sdef>
 			<div class="state-description">
-				<p><a>Indicates</a> whether a grouping element that is the <a>accessibility child of</a> or is controlled by this element is expanded or collapsed.</p>
+				<p><a>Indicates</a> whether a grouping element that is the <a>accessibility child</a> of or is controlled by this element is expanded or collapsed.</p>
 				<p>The <sref>aria-expanded</sref> attribute is applied to a focusable, interactive element that toggles visibility of content in another element. For example, it is applied to a parent <rref>treeitem</rref> to indicate whether its child branch of the tree is shown. Similarly, it can be applied to a <rref>button</rref> that controls visibility of a section of page content.</p>
 				<p>If a grouping container that can be expanded or collapsed is not the <a>accessibility child</a> of the element that has the <sref>aria-expanded</sref> attribute, the author SHOULD identify the controlling relationship by referencing the container from the element that has <sref>aria-expanded</sref> with the <pref>aria-controls</pref> property.</p>
 			</div>