ui: rating 显示向下取整

packages/ui-default/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.8.18",
+  "version": "4.8.19",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",

packages/ui-default/pages/user_detail.page.js

@@ -80,7 +80,7 @@ const page = new NamedPage('user_detail', async () => {
     series: {
       name: 'Rating',
       type: 'line',
-      data: history,
+      data: history.map((i) => Math.floor(i)),
     },
   });
 });