[a25f45] Headers attribute specified on a cell refers to cells in the same table element - Updated Inapplicable Example 6 (#2312)

* Update table-headers-attribute-refer-to-data-cells-a25f45.md

* Update _rules/table-headers-attribute-refer-to-data-cells-a25f45.md

Co-authored-by: Wilco Fiers <WilcoFiers@users.noreply.github.com>

---------

Co-authored-by: Wilco Fiers <WilcoFiers@users.noreply.github.com>
Co-authored-by: Carlos Duarte <carlosapaduarte@gmail.com>

Author: 3 people

_rules/table-headers-attribute-refer-to-data-cells-a25f45.md

@@ -405,7 +405,7 @@ The `table` is not [included in the accessibility tree][].
 This `table` doesn't have a role of `table`, `grid` or `treegrid`.
 
 ```html
-<table role="region">
+<table role="heading" aria-level="1">
 	<td id="self" headers="self">World</td>
 </table>
 ```