update comment (#4236)

src/layouts/BasicLayout.tsx

@@ -1,3 +1,9 @@
+/**
+ * Ant Design Pro v4 use `@ant-design/pro-layout` to handle Layout.
+ * You can view component api by:
+ * https://github.com/ant-design/ant-design-pro-layout
+ */
+
 import { ConnectState, ConnectProps } from '@/models/connect';
 import RightContent from '@/components/GlobalHeader/RightContent';
 import { connect } from 'dva';