fix: 左侧目录不展示gitgraph (DevCloudFE#1758)

Co-authored-by: GreatZP <greatzp@greatzp.cn>

Author: fengjiancai

packages/devui-vue/docs/.vitepress/devui-theme/styles/sidebar-links.scss

@@ -4,7 +4,7 @@
   margin: 0;
   padding: 0;
   list-style: none;
-  height: 100%;
+  height: calc(100% - 50px);
   overflow: hidden;
 
   &:hover {