fix 1px border bug of logo in light theme

src/components/SiderMenu/index.less

@@ -46,7 +46,7 @@
     .logo {
       background: white;
       border-bottom: 1px solid @border-color-split;
-      border-right: 1px solid @border-color-split;
+      box-shadow: 1px 0 0 0 @border-color-split;
       h1 {
         color: @primary-color;
       }