Sync docs from master to gh-pages

reference/html/appendix.html

@@ -287,7 +287,7 @@ Also, you can define your own properties.
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock">spring.cloud.loadbalancer.zone</p></td>
 <td class="tableblock halign-left valign-top"></td>
-<td class="tableblock halign-left valign-top"></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock">A {@link String} representation of the &lt;code&gt;zone&lt;/code&gt; used for filtering instances by zoned load-balancing implementations.</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock">spring.cloud.refresh.enabled</p></td>