还原建筑logo

web/users/html/login.html

@@ -18,7 +18,7 @@
     <div class="container login-panel">
         <form class="form-signin" method="post" onsubmit="return false">
             <h1 class="d-flex justify-content-center mb-5">
-                <img src="/web/building_saas/img/building2.png" width="40" height="40" class="mr-3" style="margin-top: 5px">
+                <img src="/web/building_saas/img/building.png" width="40" height="40" class="mr-3" style="margin-top: 5px">
                 大司空云计价
             </h1>
             <p class="change-login-p">账号登录</p>