fix: 修复knowledgeBase-create在有滚动条时时间轴图标不滚动的情况

src/assets/css/components/views/setting/knowledgeBase.scss

@@ -94,6 +94,7 @@
       }
       .el-collapse-item {
         min-height: 58px;
+        position: relative;
 
         .el-collapse-item__header {
           height: unset;