Add note to aria-brailleroledescription for "not mapped"

index.html

@@ -2429,6 +2429,21 @@ <h4>Not Mapped</h4>
 					<span class="property">Property: AXBrailleRoleDescription</span>
 				</td>
 			</tr>
+			<tr id="ariaBrailleroledescriptionUndefined">
+				<th><a class="property-reference" href="#aria-brailleroledescription"><code>aria-brailleroledescription</code></a> is undefined or the empty string</th>
+				<td class="attr-msaa-ia2">
+					<span class="property not-mapped"><a href="#not_mapped">Not mapped</a></span>
+				</td>
+				<td class="attr-uia">
+					<span class="property not-mapped"><a href="#not_mapped">Not mapped</a></span>
+				</td>
+				<td class="attr-atk">
+					<span class="property not-mapped"><a href="#not_mapped">Not mapped</a></span>
+				</td>
+				<td class="attr-axapi">
+					<span class="property not-mapped"><a href="#not_mapped">Not mapped</a></span>
+				</td>
+			</tr>
 			<tr id="ariaBusyTrue">
 				<th><a class="state-reference" href="#aria-busy"><code>aria-busy</code></a>=<code>true</code></th>
 				<td class="attr-msaa-ia2">