Add fr_BE to examples.

docs/examples.html

@@ -653,6 +653,7 @@
                             <option value="zh-TW">zh-TW</option>
                             <option value="da-DK">da-DK</option>
                             <option value="es_AR">es_AR</option>
+                            <option value="fr_BE">fr_BE</option>
                             <option value="pt-BR">pt-BR</option>
                         </select>
                         <a href="https://github.com/wenzhixin/bootstrap-table/tree/master/src/locale">Translate your language?</a>