[Core-AAM] Update searchbox mapping for ATK/AT-SPI2 to match IA2 (#2392)

Author: spectranaut

core-aam/index.html

@@ -4321,6 +4321,9 @@ <h4 id="role-map-searchbox"><code>searchbox</code></h4>
                   ><br />
                   <span class="property">Object Attribute: <code>xml-roles:searchbox</code></span
                   ><br />
+                  <span class="property">Object Attribute: <code>text-input-type:search</code>
+                  </span>
+                  <br />
                   <span class="property"
                     >Interface: <code>EditableText</code> if <a class="property-reference" href="#aria-readonly"><code>aria-readonly</code></a> is not <code>&quot;true&quot;</code></span
                   >