Update navigation.html

docs/_includes/navigation.html

@@ -18,6 +18,7 @@
 					<li class=""><a href="{{site.baseurl}}/authn/google.html"><span class="none"></span>Google Authenticator</a></li>
 					<li class=""><a href="{{site.baseurl}}/authn/kerberos.html"><span class="none"></span>Kerberos/Spengo/AD域</a></li>
 					<li class=""><a href="{{site.baseurl}}/authn/ldap_ad.html"><span class="none"></span>AD账号</a></li>
+					<li class=""><a href="{{site.baseurl}}/authn/ldap.html"><span class="none"></span>LDAP</a></li>
 				</ul>
 			</li>
 			<li class="">